In Exercises 9–14, assume that samples of differences are obtained through dependent sampling and follow a normal distribution. Calculate and .
12.
Subject | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|
Sample 1 | 1.5 | 1.8 | 2.0 | 2.5 | 3.0 | 3.2 | 4.0 |
Sample 2 | 1.0 | 1.7 | 2.1 | 2.0 | 2.7 | 2.9 | 3.3 |