1. A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. We want to determine if the average age of all the students at the university is significantly more than 24. Assume the distribution of the population of ages is normal. Using a = .05, it can be concluded that the population mean age is A. significantly different from 24. B. not significantly different from 24. C. significantly less than 24. D. significantly more than 24.

2. The following information was obtained from matched samples taken from two populations. Assume the population of differences is normally distributed.

Individual	Method 1	Method 2
1	7	5
2	5	9
3	6	8
4	7	7
5	5	6

If the null hypothesis Ho: md=0 is tested at the 5% level,

a. the alternative hypothesis should be revised.

b. the null hypothesis should not be rejected c. the null hypothesis should be rejected. d. the null hypothesis should be revised.