11. Given the following hypotheses:

H0: μ1 ≤ μ2

H1: μ1 > μ2

A random sample of 20 items from the first population showed a mean of 100 and a standard deviation of 15. A sample of 16 items for the second population showed a mean of 94 and a standard deviation of 8. Use the .05 significant level.

a. Is this a one- or two-tailed test?

b. What is the number of the degrees of freedom?

c. What is the decision rule?

d. What is the value of the test statistic?

e. What is your decision regarding H0?

If you a sample of 20 and the mean is 100 and standard deviation is 15 the data set is 115,115, 115, 115, 115,115, 115, 115, 115, 85,85,85,85, 85,85,85,85, 85, 110.8, 89.2

How do you get 110.8 and 89.2 for this data set?

a. 1 tailed test

b. 36-2 = 34, the solution sheet says 30 (many answers are incorrect on the solution sheet)

Answers in the back of the book are incorrect… very frustrating class.

Thank you for the help. Knowing how to find the data set is most important.