Homer performs three simulation studies. His

population is skewed to the right. For one study

he has his computer generate 10,000 random

samples of size n = 10 from the population.

For each random sample, the computer calculates the Gosset 95% confidence interval for

and checks to see whether the interval is correct. His second study is like his first, but

n = 100. Finally, his third study is like the first,

but n = 200. In one of his studies, Homer obtains 9,504 correct intervals; in another he obtains 9,478 correct intervals; and in the remaining study he obtains 8,688 correct intervals.

Based on what we learned in class, match each

sample size to its number of correct intervals.

Explain your answer.

Fifty students take midterm and final exams.

On the midterm exam, the mean score is 45.0

and the standard deviation is 7.00. On the final

exam, the mean score is 85.0 with a standard

deviation of 14.00. The correlation coefficient

of the two scores is 0.64.

Obtain the least squares regression line for using the final exam score to predict the midterm

exam score.

47. Fifty students take two midterm exams. On the

first exam, the mean score is 65.0 and the standard deviation is 7.00. On the second exam,

the mean score is 55.0 with a standard deviation of 10.00. The correlation coefficient of the

two scores is 0.70.

Obtain the least squares regression line for using the second exam score to predict the first

exam score.

Cholesterol level - Cholesterol level tends to increase with age in both women and men. A medical researcher wants to use statistical inference to determine if average cholesterol level for women over 60 years is lower than men over 60 years. She randomly samples 110 women and 120 men who are over 60 years. The summary statistics are given in the table below in mg/dL. Population/Group Gender Mean cholesterol level Standard deviation Women 196.9 39.8 2 Men 205.4 41.9 The medical researcher uses an appropriate hypothesis test. What is the p-value for this hypothesis test? Give your answer to 4 decimal places. Answer:Question 10 Consider the discrete random variable X given in the table below. Calculate the mean, variance, and standard deviation of X. X 6 13 19 20 P(X) 0.58 0.1 0.1 0.12 0.1 What is the expected value of X? Submit QuestionWhat is the mean and standard deviation of the discrete random variable called X_Var shown below? X_Var | Prob 1,392 | 0.2332 1,899 | 0.1385 3,418 | 0.1824 4,948 | 0.2689 8,098 | 0.1770 O mean = 3,951.00 standard deviation = 2,703.46 O mean = 3,974.93 standard deviation = 5,472,799.16 O mean = 3,951.00 standard deviation = 7,308,723.00 O mean = 3,951.00 standard deviation = 5,846,978.40 O mean = 3,951.00 standard deviation = 2,418.05 O mean = 3,974.93 standard deviation = 2,339.40Search . Share More 23 QUESTION 1 True or false. Rules for a Probability Model 1) The probabilities must be between -1 and +1. 2) The probabilities must add up to one. O True O False QUESTION 2 What is the probability of drawing a club from a deck of cards? O 0.25 O. 0.019 O 0.08 01 QUESTION 3 A study shows the favorite pizza toppings for a sample of students. One of these students is sausage. Would you use the addition or multiplication rule to solve this problem? Multiplication Rule Addition Rule Click Save and Submit to save and submit. Click Save All Answers to save all answers. ch e