Statistics and Probability questions and answers in September 2021

The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based o...
In direct adjustment, we use the internal rates found in our study and derive the adjustment using a standard population  True False When evaluating the risk ratio or odds ratio, the "alternative" va...
Which of the following statements are incorrect? A.Recall bias is a form of measurement bias that can occur in case-control and cross-sectional studies because of differential recall about past exposu...
In a cohort study comparing the risk of coronary heart disease among marathon runners compared to non-runners, the following results are observed: Risk ratio = 0.58,      95% confidence interva...
Here are summary statistics for the weights of Pepsi in randomly selected​ cans: n=36​, x=0.82414 ​lb, s=0.00572 lb. Use a confidence level of 99​% to complete parts​ (a) through​ (d) b...
Please answer all the questions. I will rate you. fill all the blanks Answer the following questions and solve the following problems in order to demonstrate increased competency with graphs, charts, ...
The Fur Feathers 'N Scales Supplies Store chain now provides curbside pickup of customer orders as an alternative delivery method. Its Pinelands Plaza store recently recorded the following numbe...
For Items #1 through #6, select the best descriptions of the shape of each distribution from among the following list. If essentially synonymous terms apply, be sure to select both, not just one. An...
James participated in an archery competition. He was allowed four attempts and was supposed to hit the bullseye in the center of the board. If the figure shows the positions of James' arrows, which of...
STAT 2112 Assignment 1 In today's world, there is a growing need for new and innovative drugs, vaccines, biologicals, diagnostics and gene therapeutics, particularly now that people are getting older ...
. classroom palencollege.exhourses/3312236/quizzes/798 Cash of Clans Pre. IN A Survey of Pied M Gaul @ Youtube O Maps D Question 23 1 pts The R value is always a value between of including .1 and 1. D...
The Pareto chart below shows the profits (in thousands of dollars) of a store, during the first six months of a year. What is the cumulative percent of profits during the three most profitable months ...
The image below shows three graphs of normal distributions. (If the image doesn't show below, click here - ND 5.pdf &) The graph with the largest mean is ___. The graph with the largest standard d...
The ACT scores of students are normally distributed with a mean of 18 and a standard deviation of 6. What percentage of students score between 10 and 15 ? Assume that the heights of women are normall...
Ity_B... S O normal O binomial Question 16 A) The following graph represents a _ probability distribution. ba B) The following graph represents a probability distribution. O A) uniform B) normal O A) ...
Variables whose values are determined by chance are called ____________ variables. The ____________ of a random variable is the long-run average of its values. 35 % of the applications for a particula...
1.     Let X have a normal distribution with mean µ= 30 and standard deviation σ= 10. Calculate P(X>40). Round to two decimal places. (4 pts) 2.    For a standard normal variable Z, comp...
1.    The IQ scores of students listed below are from a SAMPLE of MATH 300 class. IQ Scores 92 110 105 96 120 100 90 98 110 95   102 99 93 119 106 103 91 101 97 105 a.    What is the mean IQ ...
An earthquake of magnitude 7 or higher occurs in the Greater California region on average every 13 years. We have to use the Poisson distribution to model this situation and using this model determine...
work or personal life that you measure regularly (No actual calculation of the mean, standard deviation or z scores is necessary). What value is "average"? What values would you consider to be unusu...
Because you are not feeling well you do a medical test for a certain disease. For that test statistics show that patients who have this disease test positive 97% of the time, while patients who do not...
you want to buy headphones, and for each headphone the store offers  5 brands,  4 colors,  2 wireless types and  3 cord lengths. How many options are available ?   2.In how many ways can?...