Use the paired t Test and t confidence interval to answer question 1:
1. A sample of men who have a daily exercise program were matched according to age and height with men who have no such program. The weight (in kg) of each subject is recorded below.
Pair 12345678 Program 73.7 68.5 72.9 79.1 71.0 76.5 70.1 70.9 No Program 72.0 70.7 75.1 83.1 73.1 82.9 69.9 75.7
(a) Test at a = .05 if men on an exercise program weigh significantly less than men who are not on such a program.
(b) Estimate the mean difference in weight between fit and unfit individuals using a 95% confidence interval.
Use the paired Sign Test to answer question 2:
2. The data below is from a study on the dietary habits of international students attending a Canadian university. A random sample of 14 such students were asked "How many times per day did you drink milk in your homeland and in Canada?"
Student 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Homeland 2 0 5 0 0 2 1 1 1 1 1 0 3 1
Canada 3 0 3 1 3 4 5 1 1 2 2 3 1 5
Test at a = .10 if there is a significant difference in daily milk consumption at home and in Canada.