Four years ago, in an attempt to improve the situation, he began a fitness program in which employees exercise during their lunch hour. To evaluate the program, he selected a random sample of eight participants and found the number of days each was absent in the six months before the exercise program began and in the last six months following the exercise program. Below are the results.

Employee Before After 

1 7 5

2 7 2

3 5 1

4 6 2

5 4 3

6 5 6

7 7 3

8 7 7

At the 0.05 significance level,

1) What is the decision rule: Reject H₀ if t >

2) What is the test statistic