Statistics and Probability questions and answers in February 2022

An AT&T customer can decide to switch service providers for many reasons. Suppose 46% of the customers switch because of price, 23% switch because of bad service, and the rest switch because of ot...
The market price of king crab fluctuates daily based on a Normal distribution, with an average price of $57.2 per pound, and standard deviation of $4.24. On any particular day, what is the probability...
A flight from San Francisco to Portland is uniformly distributed between 1 hour 40 minutes to 2 hours long. Suppose airline XYZ claims its flight time is 1 hour 45 minutes. What is the probability tha...
Suppose you work at an electronic store, and the daily sales distribution is listed as follows:   Sales 500 1200 1900 2121 Probability 0.25 0.35 0.23 0.17 What is the expected sale for a particular d...
 . Question 32 (2 points) Given that 8 employees have the following Promotion possibilities: Lower, Middle-A, Middle-B, Upper-C, Upper-B, Upper-A, Supervisor, Executive, Manager, AVP, SVP, VP, Presid...
 . Question 31 (2 points) Saved If there are four entities participating in a relationship at a time and each one of these entities has six attributes each, what will be the degree of this relationsh...
Question 7 3 pt A large retailer wants to estimate the proportion of Hispanic customers in a particular state. How large a sample size (of the retailer's customers) do you need to estimate this propor...
Which of the following is NOT an example of the availability heuristic? Group of answer choices   Thinking that you won't get lung cancer if you smoke because you know many smokers and none of them h...
Which of these sets of lottery numbers have the LOWEST chance of being the winning numbers this week? Group of answer choices   Last week's winning numbers.   1-2-3-4-5-6   A set of 6 randomly chos...
Which of the following describes the 'specificity' of a test for a certain disease? Group of answer choices   The probability that you are likely to have a specific disease, without any knowledge of ...
Which of the following describes the representativeness heuristic? Group of answer choices   Events or scenarios with more detailed descriptions are perceived to be more likely than events or scenari...
Which of the following statements is NOT true about personal probabilities? Group of answer choices   They are used in situations where no physical assumptions can be used to calculate potential rela...
Suppose a slot machine with a $10,000 jackpot pays out an average of 95 cents on the dollar, meaning for every dollar you play over the long run, you get 95 cents back. What is the expected value per ...
In a newspaper's survey of 475 people, 54.1% said that we should replace passwords with biometric security, such as fingerprints. The accompanying Statdisk display results from a test of the claim tha...
Please provide step by step solution with guided workings and explanation . Inanswered Question 10 0 / 2 pts Use the R output provided below to forecast the time series observation at time 121. > ...
 . The results of the latest writing of the LSAT (Law School Aptitude Test) showed results that were normally distributed with a mean score of 869 and a standard deviation of 51. Enter percentage ans...
Which one of these 'X' variables is a discrete random variable? Group of answer choices An experiment in chemistry is repeated many times and X is the time required for a reaction to occur in seconds....
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of th...
 . Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1. Z= -1.07 The area of the shaded region is. (Roun...
 . Based on the AIC criteria, we select the ARMA(2,0) model using the detrended time series shown above. The second order polynomial model is given by Yt = 11.22 - 177.82t + 265t2 + Xt, where Xt is a...
 . Question 4 1 pts The combined use of ACF and PACF plots can generally be used to identify the orders of any ARMA(p,q) process. Hint: Think of the properties of ACF and PACF. How did we use the cor...
Assume that females have pulse rates that are normally distributed with a mean of u = 72.0 beats per minute and a standard deviation of o = 12.5 beats per minute. Complete parts (a) through (c) below....
This link has all the data needed   https://docs.google.com/spreadsheets/d/108yY3-3arMBmnWDIfZFWLKPJxK3p11Ya/edit#gid=21585450   Please answer A and B in Full   Part II [12 marks]  a) [6 marks] Us...
Which method best fits the title? It's not grounded theory. D Question 2 The Productivity Environment of an Elite Manufacturing Plant O Case Study Grounded Theory Phenomenology O Narrative Inquiry Eth...
Which type of research best fits the title? It's not grounded theory. Question 7 Safety Culture Matters: How Did One School Prevent a Massacre? O Case Study Ethnography O Grounded Theory Phenomenology...
Which type of research best fits this title? It's not narrative inquiry.. Question 3 The Experiences of Middle School Students Taking Standardized Tests Phenomenology O Ethnography O Case Study O Narr...
The Productivity Environment of an Elite Manufacturing Plant O Case Study Grounded Theory O Phenomenology O Narrative Inquiry O Ethnography D Question 3 The Experiences of Middle School Students Takin...
228117/quizzes/1074146/take D Question 7 Safety Culture Matters: How Did One School Prevent a Massacre? O Case Study O Ethnography Grounded Theory O Phenomenology O Narrative Inquiry D Question 8 Savi...
Which type of qualitative research method does this represent?. Search resu x 2/3 AAL - G X SIS PowerTeach X individualSt X Lu Quiz: Quiz: edu/courses/228117/quizzes/1074146/take YULOLIVII I Social Cu...
Hi,   Here is a link to the data needed to answer the problems.  https://docs.google.com/spreadsheets/d/108yY3-3arMBmnWDIfZFWLKPJxK3p11Ya/edit#gid=21585450   Please show work for both parts of this...
A survey found that the mean retail price per litre of premium grade gasoline is $1.89. Suppose the retail prices per litre are normally distributed with a standard deviation of $0.18. What percentage...