In Exercises 9–14, assume that samples of differences are obtained through dependent sampling and follow a normal distribution. Calculate and .

Question 10.9

9.

Subject 1 2 3 4 5
Sample 1 3.0 2.5 3.5 3.0 4.0
Sample 2 2.5 2.5 2.0 2.0 1.5

10.1.9