Chapter 15: Shoe wear example; soles A and B. 20 subjects in a
paired experiment.   

Col 1: Subject number.
Col 2: Sole material A.
Col 3: Sole material B.
Col 4: B-A.

1   8.3  8.7   0.4
2   6.3  6.1  -0.2
3   7.5  7.9   0.4
4   2.6  3.1   0.5
5   8.5  8.8   0.3
6   7.6  7.2  -0.4
7   5.4  5.7   0.3
8   4.4  4.6   0.2
9   3.6  4.3   0.7
10  3.8  4.2   0.4
11  2.4  2.6   0.2
12  5.6  5.9   0.3
13  3.5  3.3  -0.2
14  6.5  6.8   0.3
15  2.8  3.6   0.8
16  4.8  4.8   0.0
17  6.9  7.1   0.2
18  1.7  2.3   0.6
19  5.1  5.3   0.2
20  5.2  5.6   0.4