Statistics and Probability questions and answers in October 2022

 . Using the TI-84 calculator, find the area under the standard normal curve. Round the answers to four decimal places. (a) Find the area under the standard normal curve that lies outside the interva...
The daily demand for muffins at a bakery is normally distributed with mean 50 and standard deviation 10. The bakery makes 65 muffins once at the start of each day. What is their service level for muff...
 . Taxes: The Internal Revenue Service reports that the mean federal income tax paid in the year 2010 was $8040. Assume that the standard deviation is $5000. The IRS plans to draw a sample of 1000 ta...
PROBLEM #1 A local aquarium wants to model their visitor rate to determine whether or not to introduce staggered entrance times for guests on weekends. According to their records, over a randomly sam...
 . 3. How many widgets need to be sampled in order to be 98% confident that the error in estimating the true proportion of defective widgets is at most 0.05? Assume you have no idea what the true pro...
 . 2. A drug company has introduced a new treatment for the flu. The current leading brand's treatment cures the flu in 80% of patients. In a random sample of 200 people, the new treatment cured th...
 . 1. Suppose that Jerry (a baker) wants to find a 95% Confidence Interval for the mean baking time for all of his jelly donuts. He takes a random sample of 40 jelly donuts over the course of several...
 . 1 Random Variables: Averaging polls Polling firms do lots of statistical modeling to improve the quality of their estimates. As in most modeling problems, they face a bias/ variance tradeoff: the ...
 . Fang and Rachel plan to meet in Grissom to work on IE 230 material. Suppose that Fang and Rachel's arrival time are independent of each other. Rachel's arrival time is uniformly distributed betwee...
A company has estimated that the probabilities of success for three products introduced in the market are 1/4, 2/9, and 1/3, respectively. Assuming independence, find the probability that none of th...
 . Blackboard X UO B Q B Remaining Time: 1 hour, 59 minutes, 10 seconds. Question Completion Status: For a binomial distribution with n = 10, find E(X) given p=0.4. Round to 3 decimal places. QUESTIO...
 . Remaining Time: 1 hour, 59 minutes, 15 seconds. Question Completion Status: QUESTION 10 For a binomial distribution with n = 10, find P (X 2 5) given p=0.4. Round to 3 decimal places. QUESTION 11 ...
 . Blackboard -> X C O E Q B Remaining Time: 1 hour, 59 minutes, 25 seconds. Question Completion Status: QUESTION 5 A sample space consists of 4 simple events, namely E1, E2, E3, and E4 with the f...
IS THIS CORRECT?. 1. The following are two samples of class scores (you may consider these scores to be normally distributed). Julia received the two scores marked with an asterisk. Did she do better ...
A student received a B grade in English (7 units), a C in Statistics  (4 units), an A in Biology ( 4 units) , and a D in Physical Education ( 3 units). Assuming A = 4 grade points, B = 3 grade points...
 . Explain how to find the slope and intercept for the The regression equation is displayed output. Choose the correct answer below. Armspan = 42.8 + 1.99 Height O A. The slope is the number being mu...
Construct a steam-and-leaf plot for the given scores. Use the first digit as the steam and the second digit as a leaf. 35     44     21     15     33     41     11     14     1...
True or False. If the statement is True, then indicate True. If the statement is False, then indicate False and carefully explain with no more than three sentences why the statement is false. Looking ...
 . A vineyard owner takes a random sample of 11 bottles of wine produced by her vineyard. For each bottle the volume of wine (in ml) is recorded and the results are given below. 753.4 753.7 745.3 745...
  Suppose you open a bag of M&Ms and count the number of M&Ms you have of each color. Suppose there were the following: Qty 10 blue Qty 8 orange Qty 4 yellow Qty 3 green Qty 5 brown Qty 3 red...
After reviewing a movie, 900 people rated the movie as excellent, good, or fair. The following data give the rating distribution. You have to represent this data with a pie chart. Find the degree of t...
7.8 The U.S. Census Bureau announced that the median sales price of new houses sold in January 2018 was $323,000, and the mean sales price was $382,700. Source: www.census.gov/newhomesales, March 8, 2...
An experimenter is interested in whether reading before going to bed will influence people's sleep quality. The experimenter randomly assigns subjects to two groups. The data consist of subjects' rati...
Calculate the cumulative survival probabilities for the two treatment groups [ 9 marks ]  Draw a graph showing both cumulative survival probabilities?  [ 2 marks ]  Investigate the two survival pro...
 . User Name: Instructor: Date: (print clearly) 80. (6 points) 3. Ten thousand adults were given a literacy test. The results were nearly normally distributed (u = 75, 6 = 15). (20 points). C. Find t...
Just question D please. The rest are context.. 1 Random Variables: Averaging polls Polling firms do lots of statistical modeling to improve the quality of their estimates. As in most modeling problems...
The frequency distribution shown is constructed incorrectly. Class Frequency 11 - 15 7 16 -20 4 21- 25 9 25 - 29 2 What is the mistake? Group of answer choices None of these answers   class limits ov...
Nicotine Patches. In one study of smokers who tried to quit smoking with nicotine patch therapy, 39 were smoking one year after the treatment, and 32 were not smoking one year after the treatment (bas...
MUST EXPLAIN ANSWER USING SIMPLE RANDOM SAMPLE AS THE EXPLANATION NOT THE CENTRAL LIMIT THEOREM!!!!!. B. Would it be reasonable to use this information to generalize about the distribution of weights ...
Using the reference below:  2a. Describe the data collection methodology and data set in one or two sentences. 2b. How was the distribution of the data set reported? 2c. Was this an appropriate choic...
Please help me to solve this excel worksheet problem Please upload your answers as an excel file with properly labeled answers       . 9781284108217_WORK_Excel2007.pdf (SECURED) . Adobe Acrobat Pr...
2 3 4 5 9 10 11 13 15  . During certain time periods at a hospital, patients arriving at the emergency room have waiting times that are uniformly distributed between 0 and 9 minutes. Assume that a pa...
What is your research question? What is your hypothesis or prediction and why? The obtained results of the analysis. What is the chi-square value and the significance level? Is it statistically signif...
Identify the true statements about the correlation coefficient, 𝑟. The absolute value of 𝑟 describes the magnitude of the association between two variables. The correlation coefficient is not ...
i need in solving all the above questions. qu n We have calculated a 95% confidence interval for p and would prefer to have a smaller margin of error 2* without losing any confidence. In order to do t...
i need in solving all the above questions. An exhaustive study of all active Facebook accounts was recently conducted by Facebook. One variable Facebook recorded was the number of friends X of each Fa...
i need in solving all the above questions. The heights of European 13-year-old boys can be approximated by a normal model with mean / of 64.3 inches and standard deviation o of 2.36 inches. Question 1...
i need in solving the above questions i only need help in question 3. Just before a city referendum on a school budget, a local newspaper polls 490 voters in an attempt to predict whether the budget w...
i need in solving all the above questions. More than 100 million people around the world are not getting enough sleep; the average adult needs between 7.5 and 8 hours of sleep per night. College stude...
You work in a Title I school with 95% of your students receiving free or reduced-cost meals. Your principal wonders if there is a relationship between the socio-economic status of your students and sl...
 . question 9 Corpt 03 # 99 0 Details You draw one card from a standard deck. (a] What is the probability of selecting a king or a queen? (b) What is the probability of selecting a face card or a 10:...
A random sample of n = 600 observations from a binomial population produced x = 225 successes. Calculate the 95% margin of error. (Round your answer to three decimal places.) 0.059 0.055 0.046 0.039 0...
Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations given below. n 1 = n 2 = 80, x 1 = 125.3, x 2 = 123.8, s 1 = 5.3, s 2 = 6....
​ ​help. Independent random samples were selected from two quantitative populations, with sample sizes, means, and variances given below. Population 1 2 Sample Size 36 46 Sample Mean 9.5 7.5 Sampl...
To compare the effect of stress caused by noise on the ability to perform a simple task, 86 subjects were divided into two groups—38 subjects as a control group, and 48 subjects as the experimental ...
Michael Turner, the local sheriff, suspects that many of his city's residents are operating motor vehicles without current inspection stickers.  To determine whether this is true, Michael has his dep...
A statistical program is recommended.A large supermarket chain has invested heavily in data, technology, and analytics. Feeding predictive models with data from an infrared sensor system to anticipate...
A statistical program is recommended. Consider the following data for two variables,  x  and  y . x i 4 5 7 8 10 12 12 22 y i 12 14 16 16 18 20 24 20 (a)Compute the standardized residuals for these...
The relative frequencies for a set of data are shown in the table below. Value Relative Frequency 1 0.15 2 0.30 3 0.45 4 0.10 If there are a total of 40 data values, with what frequency does the data ...
. . Lori Jeffrey is a successful sales representative for a major publisher of college textbooks. Historically, Lori obtains a book adoption on 28% of her sales calls. Viewing her sales calls for one...
 . A random sample of college football players had an average height of 66.5 inches. Based on this sample, (64.2, 67.1) found to be a 95% confidence interval for the population mean height of college...
 . Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was estimated that the current proportion of customers who click on ads...
Treat the number of months X after January 1 that someone is born as uniformly distributed from 0 to 12. Round all answers to 4 decimal places where possible. What is the distribution of XX? XX ~ U(,)
Read the "Thinking Critically About Statistics in Business Today: Are You Going to Hate Your New Job?" section in Chapter 13 of Business Statistics for Contemporary Decision Making. Discuss other simi...
 Suppose you are testing the following hypotheses:   H 0 : µ = 3200 (The population mean is equal to 3200.) H a : µ ≠ 3200 (The population mean is not equal to 3200.)   Sample size is 9. The sa...
Question  1. Please explain Single-Population Means Using Student's t Distribution and Confidence Intervals of Single-Population Means with the Student's t-Distribution(non-text book explanation) ple...
 . Problem 7-38 The average active-ingredient yield per liter of raw material for samples of vials may be approximated by a normal distribution with mean 23 grams and standard deviation 0.2 grams. (a...
You take all possible samples of size 100 from a very large population of values. The mean of the population is 550. The standard deviation is 50. You compute the mean of each sample. 95% of the sampl...
Each sweat shop worker at a computer factory can put together 4.6 computers per hour on average with a standard deviation of 0.9 computers. 8 workers are randomly selected to work the next shift at th...
You are interested in constructing a 99% confidence interval for the proportion of all caterpillars that eventually become butterflies. Of the 424 randomly selected caterpillars observed, 51 lived to ...
A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 55 specimens and counts the number of seeds in each. Use her sample results (mean = 74.3, standard deviation ...
We wish to estimate what percent of adult residents in a certain county are parents. Out of 400 adult residents sampled, 372 had kids. Based on this, construct a 95% confidence interval for the propor...
1.If X, a random variable, follows a normal distribution,   the shape of the distribution (bell curve) is symmetric   the shape of the distribution (bell curve) is positively skewed   the shape of ...
Assume that a sample is used to estimate a population proportion p . Find the 99.9% confidence interval for a sample of size 201 with 63 successes. Enter your answer as a tri-linear inequality using d...
A psychiatrist is interested in finding a 98% confidence interval for the tics per hour exhibited by children with Tourette syndrome. The data below show the tics in an observed hour for 13 randomly s...
The average amount of money spent for lunch per person in the college cafeteria is $5.71 and the standard deviation is $2.99. Suppose that 41 randomly selected lunch patrons are observed. Assume the d...
The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.5 ppm and standard deviation 1.5 ppm. 39 randomly selected large cities are studied. Round al...
You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately σ=31.2σ=31.2 do...
A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 2.5% margin of error at a 99% confidence level, what size of sam...
Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval for a sample of size 1018 with a mean of 63.4 and a standard deviation of 21.7. Enter your answer as...
You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:   41.8 49.6 53.6 37.3 47.2 42 28.3 72.6 56.2 36.2 Find the 90% confidence interval. Enter your a...
A computer selects a number XX from 0 to 6 randomly and uniformly. Round all answers to 4 decimal places where possible. What is the distribution of XX? XX ~ U(,) Suppose that the computer randomly pi...
The average amount of money spent for lunch per person in the college cafeteria is $5.71 and the standard deviation is $2.99. Suppose that 41 randomly selected lunch patrons are observed. Assume the d...
We have the weights of 18 individuals (9 men and 9 women) weight women: 38.9, 61.2, 73.3, 21.8, 63.4, 64.6, 48.4, 48.8, 48.5. weight men: 67.8, 60, 63.4, 76, 89.4, 73.3, 67.3, 61.3, 62.4  Can it be s...
Assume that a sample is used to estimate a population proportion p . Find the 80% confidence interval for a sample of size 193 with 66% successes. Enter your answer as an open-interval ( i.e. , parent...
Please answer the following questions.   1. Please explain what single-population mean using the normal distribution. (non-text books explanation) Provide example.   2. Please explain what confidenc...
Formulate the null and alternate hypotheses for the following situations. (identify the correct number 𝜃 0 and write 𝐻 0 : 𝜃 = 𝜃 0 and the appropriate analogous expression for 𝐻 1 ). - ...
Solve problem attached with data attached  . Survey Among Islands Restaurant Guests Not at all Important Extremely Important Slightly Important Quite Important Very Important Quite Dissatisfied Very ...
 . Grade Distribution for a Class A student is selected at random. What is the probability the student selected is a female or received an 'A' grade? What is the probability a student selected at...
Task 3 Basic relationship   The company has 550 employees, 380 of them have higher education, and 412 have specialized secondary education, 357 employees have both higher and specialized secondary ed...
 . Score: 13/30 5/12 answered . Question 4 Jian waits for the bus daily, and determines his wait times are uniformly distributed between 0 and 8 minutes as shown in density function pictured: De- 4 8...
 . . Question 5 Wait times at the bank are Uniformly Distributed between 0 and 10 minutes. Find the probability a randomly chosen person waits: Enter fraction or round results to two decimal places. ...
 . Ch5 Score: 380 3:12 answered I Question 9 v < > Wait times for the bus are Uniformly Distributed between 3 and 16 minutes. Find the probability a randomly chosen person waits: Enter fraction...
 . Home Due Sunday by Announcements Modules Ch 5 llabus Score: 8/30 3/12 answered to Video . Question 11 7 Wait times for the bus are Uniformly Distributed between 4 and 17 minutes. 365 Find the (pop...
 . 3-38. Use Appendix A Table I to determine the following probabilities for the standard normal random variable Z. (a) P(-1 < Z<1) (b) P(-2 < Z < 2) (c) P(-3 < Z<3) (d) P(Z < -3...
 . Problem # 2: A medical linear accelerator is used to accelerate electrons to create high-energyr beams that can destroy tumors with minimal impact on surrounding healthy tissue. The beam energy ?...
  Could I please get helped answering this question? I know that the equation is X^2=(observed-expected)^2/Expected. 19. A researcher records data on how many individuals of three species of duck lan...
In 2017 , Americans spent a record-high  9.1 billion on Halloween-related purchases (the balance website). Sample data showing the amount, in dollars, 16 adults spent on a Halloween costume are as fo...
1. The type of household for the U.S. population and for a random sample of 411 households from a community in Montana are shown below. Type of Household Percent of U.S. Households Observed Number o...
asap answers. A binomial experiment is performed a fixed number of times. What is each repetition of the experiment called? For each repetition of a binomial experiment, what are the two mutually excl...
 . What is the formula for the expected number of successes in a binomial experiment with n trials and probability of success p? Choose the correct forumla below. O A. E(X) = vnp(1 - p) O B. E(X) = n...
isted below are measured amounts of caffeine​ (mg per 12oz of​ drink) obtained in one can from each of 14 brands. Find the​ range, variance, and standard deviation for the given sample data. Inc...
answers only plz. ASAP.. (c) Using the binomial distribution, the probability that exactly 9 flights are on time is (Round to four decimal places as needed.) Interpret the probability. In 100 trials o...
 . 5. [10 pts] Petros is playing a game with urns and marbles. The game works like this: Petros will presented with two opaque earns that look identical in ap- pearance. The first urn has 4 red marbl...
I need answers only plz. . (d) Compute the standard deviation of the random variable X. Ox hits (Round to three decimal places as needed.) (e) What is the probability that in a randomly selected game...
 . 4. [10 pts] Juan is preparing for his final in his Calligraphy class. He went to office hours to inquire about format of the exam, where the Calligra- phy TA implied that the exam will consist of ...
 . 3. [10 pts] Kik and Nate decided to go shell picking at different beaches. For each shell that Kik catches, Nate has promised to give him $10. In each beach that they visit, Kik has an 86% probabi...
 . 2. [10 pts] Alex is browsing through the Math section in Penn's Library. Let X be a non-negative random variable representing the publication year of each book in the section. Let Y be a non-negat...
 . A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n independent trials of the experiment. n = 9, p=0.6, x<3 The probability...
The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 249.8 and a standard deviation of 65.6. ​(All units are 1000 ​cells/μ​L.) Using the empirical​ ...
Collin records the number of text messages he receives each day, and he records 5, 5, 6, 7, 8, 8, 9, 10, 12, 14, 16, 18. What is the relative frequency of the a day in which he receives between 5 and ...
There is a bag of marbles.  Inside the bag there are 10 blue marbles, 6 red marbles and 5 green marbles.  Two marbles are selected from the bag without replacement.  What is the probability that th...
The question contains all relevant information.. (b) (2 points) Suppose we decide to aggregate the polls by taking a simple average: Find the bias7 variance7 and MSE of X}; in terms of the parameters ...
 . 1 Random Variables: Averaging polls Polling firms do lots of statistical modeling to improve the quality of their estimates. As in most modeling problems, they face a bias/ variance tradeoff: the ...
A population of 10 year old boys is known to have an average weight of 80 lbs with a standard deviation of 8 lbs.  Let's say you take a random sample of 40 boys from this population.  Using the Cent...
What price do farmers get for their strawberry crops?  In the third week of April, a random sample of 33 farms gave a sample mean of $68.00 per 10 pounds of strawberries. Assume that 𝜎 is known to...
 . WeBWork : MAT_140_411_110( X b Answered: D Consider the grap X Dashboard X + UPGRADE TO MACOS MONTEREY 1m ago C webwork.is.depaul.edu/webwork2/MAT_140_411_1100/HW8/9/?effectiveUser=iabourah@depaul...
There is a bag of marbles.  Inside the bag there are 10 blue marbles, 6 red marbles and 5 green marbles.  Two marbles are selected from the bag without replacement.  What is the probability that th...
Which of the following is not an assumption of a linear regression? 1. The slope of the relationship between the X and Y variables is constant. 2. The variance from the regression line is the same 3. ...
 . 5. Melanie is a researcher who wishes to estimate the mean birthweight of full-term babies in her hospital. What minimum number of babies should she sample if she wishes to be at least 99% confide...
Given data 1, 3, 7, 9, 10, 13, 14, 18, 20, find the 5-number summary used to create a box and whisker plot. Round to the nearest tenth if necessary.   minimum = 1, median = 15, Q1 = 10, Q3 = 16, maxi...
 . 3. Residential mailboxes in Des Moines, Iowa, should be installed such that the bottom of the mailbox is 42 inches above the ground. This rule is designed for safety and to accommodate short mail ...
 . 2. The mean daily energy requirement for eight-year-old boys is 2200 calories. An education researcher believes many students in this group do poorly in school due to an inadequate diet and not ha...
 . 1. An average lawn has a mean of 21 blades of grass per square inch. A garden store sells an expensive fertilizer designed to transform an average lawn into a lush, thick carpet within three weeks...
 . 2. Use the empirical rule (68-95-99.7) to determine if the following maximum daily rainfall totals could be considered to be normally distributed. (16 points) 1.1, 1.2, 1.5, 1.55, 1.71, 1.75, 1.9,...
Assume a model with 3 numerical explanatory variables and 1 categorical explanatory variable with 8 category levels.  Further assume the model includes the possibility that the relationship between t...
Susan needs to choose 4 people for her group project.  There are 12 people in the class to choose from.  How many different combinations of groups could she choose for his group project?   Question...
Using Desmos ( https://www.desmos.com/calculator ), graph the following rational function and then sketch its graph below:       Add the graphs of dashed vertical lines at and at along with a da...
Please answer the following    3. (2 points) A development economist is interested in studying the incomes of consumers in a particular country. The population standard deviation is known to be $1,0...
Using the accompanying​ data, develop a​ cross-tabulation for Gender and Vehicle​ Driven; then convert this table into probabilities. a. What is the probability that the respondent is​ female?...
Three coins are dropped on a table. a. Let A be the event​ "exactly two​ heads." Find​ P(A). b. Let B be the event​ "at most one​ head." Find​ P(B). c. Let C be the event​ "at least two?...
A company's raw data sample of weekly salaries (in dollars) is shown below. 210   370   530   370   740   530    370   530   210   370   1140   210 A frequency distribution of th...
The variance in a production process is an important measure of the quality of the process. A large variance often signals an opportunity for improvement in the process by finding ways to reduce the p...
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  7.21 NonSVR 6.79 NonSVR 7.43 NonSVR 6.88 NonSVR 6.78 NonSVR 7.52 NonSVR 6.97 NonSVR 6.62 NonSVR 7.02 NonSVR 6.9 NonSVR 6.82 NonSVR 6.95 NonSVR 6.62 NonSVR 7.05 NonSVR 7.13 NonSVR 7.17 NonSVR 6.99 N...
 R programming question. Stuck with the input R code.  The only package allowed is ISLR2. Consider the dataset Wage in ISLR2. We are interested in predicting wage given age.    . We are interested...
Lauren drinks a variety of soft drinks. Over the past​ month, she has had 18 diet​ colas, 2 cans of​ lemonade, and 7 cans of root beer. a. Given this​ history, what is the probability that her...
             . On average, indoor cats live to 15 years old with a standard deviation of 2.7 years. Suppose that the distribution is normal. Let X = the age at death of a randomly selected indo...
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show work please. Cameron's syndrome is a condition where a person likes math. Suppose a test for Cameron's syndrome is developed, and tested on a sample of people who are known to have Cameron's synd...
Show work please  . Suppose a group of 42 persons include of 14 persons of Type A, 15 persons of type B, and 13 persons of Type C. How many different sets of 13 people can be formed? How many differe...
Question. Suppose an event can occur X : 0, 1, 2, times. You have a crystal ball that will give you the exact probability the event occurs k or fewer times. It tells you: P(X g 6) : 0.46 P(X g 9) : 0....
Find the​ range, variance, and standard deviation for the given sample​ data, if possible. If the measures of variation can be obtained for these​ values, do the results make​ sense?   Biolog...
Please help me solve these questions and state answers clearly!! THANK YOU!!. 9. [-l4.16 Points] ASWSBE14 7.E.037. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You may need to use the appropriate append...
 . A B C D E F G 14 15 16 17 18 19 Invoice 20 Store Columbus 21 22 Product 32" TV Laptop 19" monitor DVD recorder Camcorder Home theater 23 Product index 1 2 3 4 5 6 24 Number purchased 1 H...
Below are the jersey numbers of 11 players randomly selected from a football team. Find the​ range, variance, and standard deviation for the given sample data. What do the results tell​ us?   15?...
El costo promedio anual de un seguro de automóviles es de $939 dólares, suponga que la desviación estándar es de $245 dólares ¿Cuál es la probabilidad de que en una muestra aleatoria simple de ...
Is this a normal distribution?. 4. You have the following data set of ages of students in a community college chemistry class. 19 25 20 20 19 20 21 20 19 45 21 21 20 22 19 29 21 21 23 22 18 21 20 34 1...
 . X 121 MyStatLab Quizzes & Tests - SCS X 10-1 MyStatLab: Final Exam x Course Hero x | | Chegg.com earson.com/Student/PlayerTest.aspx?testld=243503171 Statistics 22TW1 Final Exam Question 34 of ...
What is the probability that a randomly selected person is an Adult AND a Tourist? Given that the randomly selected person is a Child, what is the probability that they are a Resident? What is the pro...
 . Joy likes six types of bagels: plain, raisin, chocolate, blueberry, egg, and everything. How many different ways are there to choose 6 bagels when she can can choose at most two everything bagels?...
   . Question 17, 3.5.5 HW Score: 89%, 17.8 of 20 Part 2 of 5 points Points: 0.8 of 1 Save Use the side-by-side boxplots shown to complete parts (a) through (e). X y 30 60 90 120 . . . (a) What is t...
If a baseball player has a batting average of 0.390​, what is the probability that the player will get the following number of hits in the next four times at​ bat?   ​(A) Exactly 2 hits   ​(...
Based on computer output, the percentage of people in a country who do not have health insurance is summarized as follows:            Min         Q1        Median           Q3  ?...
The mean age at first marriage for respondents in a survey is 23.33, with a standard deviation of 6.13. Suppose that a person experienced their first marriage at age 23. If the area beyond the Z-score...
 Can you use the RStudio and show the process, please.. b) Calculating quantiles for the t-distribution. Let T be a random variable which follows a Student t-distribution with 9 degrees of freedom i)...
Assume that the distribution of wait times for the Seven Dwarfs Mine Train attraction at Disney World is normally distributed with a mean of 107 minutes and a standard deviation of 30.4 minutes. Use t...
 . Suppose a simple random sample of size n = 150 is obtained from a population whose size is N = 30,000 and whose population proportion with a specified characteristic is p = 0.2. Click here to view...
 . The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). . . . (a) Do ...
Of 41 bank customers depositing a check, 20 received some cash back. (a) Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back. (Round your answers to 4...
 . The most famous geyser in the world, Old Faithful in Yellowstone National Park, has a mean time between eruptions of 85 minutes. If the interval of time between the eruptions is normally distribut...
 . Complete parts (a) and (b) below. The number of dogs per household in a small town Dogs 0 2 3 4 5 Probability 0.645 0.224 0.086 0.021 0.016 0.008 (a) Find the mean, variance, and standard deviatio...
A random sample of 16 pharmacy customers showed the waiting times below (in minutes).   22 19 19 19 21 17 20 17 24 19 25 26 20 21 19 21      Click here for the Excel Data File   Find a 90 percent...
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A random sample of 10 shipments of stick-on labels showed the following order sizes. 18,779 21,184 52,629 11,409 44,089 16,009 22,123 57,683 33,048 15,256 (a) Construct a 95 percent confidence interva...
A poll of 2,203 likely voters was conducted on the president's performance. Approximately what margin of error would the approval rating estimate have if the confidence level is 95%? (Round your answe...
 . Consider a population that grows according to the recursive rule Pn = Pn-1 + 120, with initial population Po = 20. Then: P1 = P2 = Find an explicit formula for the population. Your formula should ...
7 - Calculate the 95% margin of error in estimating a binomial proportion  p  for the following sample size. Use  p̂  = 0.6 to calculate the standard error of the estimator. (Round your answer t...
Business Stats. A statistics instructor is testing out a new online learning module for a placement test: they give all 45 students in the class a test before students use the new module, and then a t...
HOW MANY OUTLIERS?. 4. You have the following data set of ages of students in a community college chemistry class. 19 25 20 20 19 20 21 20 19 45 21 21 20 22 19 29 21 21 23 22 18 21 20 34 18 20 20 21 2...
  Please solve. 1.86. Show that (a) P(A UB) = 1 - P(An B) (b) P(AnB) 2 1 - P(A) - P(B) (c) P(A AB) = P(A UB) - P(A ( B). 1.86. Hint: (a) Use Eqs. (1.21) and (1.39). (b) Use Eqs. (1.43), (1.39), and (...
 . Problem 1 Part 1 In a clinical study. 1000 subjects were vaccinated with a vaccine manufactured with a new ingredient. Over a period of roughly 23 weeks. 6 of these subjects developed the flu. a]...
The Wall Street Journal reported that  33% of taxpayers with adjusted gross incomes between $30,000 and $60,000 itemized deductions on their federal income tax return. The mean amount of deductions f...
The company Drug Test Success provides a "1-Panel-THC" test for marijuana usage.  Among 300 tested subjects, results from 27 subjects were wrong (either a false positive or a false negative).  Use a...
Fill out the missing values of this ANOVA table.     . (244) Mexico's Safest City - X *Course Hero X Quiz: Quiz 8: ANOVA X G ill out the missing values of this x C utexas.instructure.com/courses/13...
Generate a Representative Sample of the Data Select a region and generate a simple random sample of 30 from the data. Report the listing price's mean, median, and standard deviation and square foot va...
HOW MANY OUTLIERS ARE PRESENT? WHAT IS THE SHAPE OF THE DISTRIBUTION?. B. Given what you know about this data, describe the shape of the distribution of ages and comment on the existence of outliers. ...
 . Determine the following probabilities. a. For n = 2 and it = 0.12, what is P(X = 0)? b. For n = 10 and it = 0.50, what is P(X = 9)? c. For n = 10 and It = 0.60, what is P(X = 8)? d. For n = 5 and ...
 . 6. Let X be a rv with cdf 0 for x < 0 A for 0 < x <1 8 1 X F( X) = - + for1 < x < 2 4 8 3 X + for 2 < x<3 4 12 for x 2 3 a) Is the random variable of the continuous type? Why ...
 . 4. Consider three rv's X, Y, and 2, which describe the electricity demand for March, June, and August, respectively. Because these are non—consecutive months, assume that the rv's are independen...
Find the p-value. Field tests of a low-calorie sport drink found that 53 of the 110 who tested the beverage preferred it to the regular high-calorie drink. A breakeyen analysis indicates that the laun...
Luis wants to know if an apple a day keeps the doctor away, so he took a group of participants and assigned them to eat 1 apple a day for 4 months. After 4 months, Luis asked participants how many tim...
A large Portland manufacturer wants to forecast demand for a piece of​ pollution-control equipment. A review of past sales ​( At ​), as shown​ below, indicates that an increasing trend is pres...
 A random sample of 22  of Midtown residents in Atlanta have been selected to be studied  for their expenditure on theater tickets.  The mean of spending for this group is  $135  with a standard...
How do I write an APA summary of the conclusions of this study? I need to include the following: What is being studied and what is the hypothesis being tested? What type of test was used and is it app...
  On January 7, 2000, the Gallup Organization released the results of a poll comparing the lifestyles of today with yesteryear. The survey results were based on telephone interviews with a randomly s...
 . A group of researchers hypothesized that under a quiet condition, students would perform better compared students under a noisy condition. To test this idea, they randomly assigned 9 participants ...
Use the above information to answer the following questions by choosing the most correct option or typing the answer.   1. What is the expected value for Australians who used Paypal? (2dp)   2. What...
An academic is interested in whether international collaboration, measured by the international co-publication rate, is associated with a higher quality of scientific work, measured by the relative im...
help pls with q3. Question 14, HW Score: 89.33%, O 3.4.RA-2 17.87 of 20 points Part 3 of 3 Points: 0.67 of 1 Save Suppose the data represent the inches of 0.75 2.33 3.93 5.76 rainfall in April for a c...
  please help with letter b, so confused . HW Score: 89.33%, 17.87 of 20 points @ Points: 0.2 of 1 Question 17, 3.5.5 Parl2015 Use the side-by-side boxplots shown to complete parts (a) through (a). ...
The unprecedented shift to remote learning during the Covid-19 pandemic offered a chance to learn about student experiences and needs and possible future trends in unit design. An educator set out to ...
Suppose that men's mean heartrate is 84.6 beats per minute (bpm), and women's mean heartrate is 82.1 bpm. Both have a standard deviation of 3.6 bpm. You randomly poll 35 men and 35 women. What is the ...
 develop a model for the Dow Jones Industrial Average predicting the S&P 500 value. What is the value of SSR? SSE?  what is the b0?   Date DJIA S&P 500 January 6 12,360 1,278 January 13 12,...
The useful life of a bicycle bought at Basement-mart fits a log normal distribution with a mean of 22 months and a standard deviation of 13.72 months. Suppose that 96 bicycles are randomly chosen, and...
Below is a set of two SPSS simple effects tests using the split file function. Note that this  only looks at two of the simple effects tests rather than all four. The first simple effects looks at  ...
Which of the following is the correct write-up for the interaction and (if significant) follow- up simple effects tests?  A. The interaction of Crowd Size condition by Location condition was not sign...
3). Which of the following is the best choice and preferably in the American Psychological Association formatting for writing out the Crowd Size condition  main effect (Mostly Empty versus Mostly Ful...
2). Choose the correct interpretation of the Tests of Between Subjects Effects table:  A. There are two significant main effects and one significant interaction  B. There is one significant main eff...
Not sure about my answer here:  . To study the factors that affect output in an industry, a random sample of 138 firms who recently made artificial limbs is taken. (Artificial limbs are mechanical re...
 . Hint(s) Check My 1Nork The CPA Practice AdVIsor reports that the mean preparation fee for 2017 Federal Income tax returns was $273. Use this price as the population mean and assume the population ...
Scores on an exam: 65   88  73   77   70  68   67   95  81   91     Calculate the t -statistic. Find the t cv  for a two-tailed t -test with = .05. Make decision whether to reject or...
 . The mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about 69 mm. Assume yearly rainfall is normally distributed. Round the probabilities to four decimal pl...
 . The mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about 69 mm. Assume yearly rainfall is normally distributed. Round the probabilities to four decimal pl...
 . The test statistic of z = - 1.61 is obtained when testing the claim that p = 4/7. a. Using a significance level of a = 0.01, find the critical value(s). b. Should we reject Ho or should we fail to...
 . The test statistic of z = - 2.84 is obtained when testing the claim that p < 0.73. K a. Using a significance level of a = 0.10, find the critical value(s). b. Should we reject Ho or should we f...
You are a supervisor at Regional Call Center's Washington, DC, facility. Regional provides contract call center services for a number of companies, including banks and major retail companies. You have...
I am having a problem with this question. I am using the Formula (a+b)/c = Midpoint [ie. (5.0+9.9)/2=7.45], but it Aleks keep telling me that my answers are wrong. Could Someone Help Me Please?    ....