Question: The Savings and Loan where you work has asked you to compare its new advertising campaign to the campaign it had been using. You have gathered sample data on the number of accounts for both the old and the new campaigns. The data are as follows:

OLD : 40, 28, 35, 38, 31, 42, 26, 44, 29, 43

NEW: 29, 26, 31, 26, 28, 31, 19, 21, 27, 30

Determine for each of the two advertising campaigns the following:

a. Calculate the mean, median, and the mode for each group of data. (6 points)

b. Calculate the variance and the standard deviation for each group of data. (Be sure to indicate which formula you are using) (4 points)

c. Calculate a 95% Confidence Interval for the two sets of data. What do these Confidence Intervals tell us? (8 points)

d. Which of the two campaigns is the more successful? Justify your decision. (2 points)