Biostatistics

418 CHAPTER 9 SIMPLE LINEAR REGRESSION AND CORRELATION
shown in Table 9.3.1. A question of interest is how well one can predict and estimate deep
abdominal AT from knowledge of the waist circumference. This question is typical of those
that can be answered by means of regression analysis. Since deep abdominal AT is the
variable about which we wish to make predictions and estimations, it is the dependent
variable. The variable waist measurement, knowledge of which will be used to make the
predictions and estimations, is the independent variable.
TABLE 9.3.1
Waist Circumference (cm), X, and Deep Abdominal AT, Y, of 109 Men
Subject X Y Subject X Y Subject X Y
1 74.75 25.72 38 103.00 129.00 75 108.00 217.00
2 72.60 25.89 39 80.00 74.02 76 100.00 140.00
3 81.80 42.60 40 79.00 55.48 77 103.00 109.00
4 83.95 42.80 41 83.50 73.13 78 104.00 127.00
5 74.65 29.84 42 76.00 50.50 79 106.00 112.00
6 71.85 21.68 43 80.50 50.88 80 109.00 192.00
7 80.90 29.08 44 86.50 140.00 81 103.50 132.00
8 83.40 32.98 45 83.00 96.54 82 110.00 126.00
9 63.50 11.44 46 107.10 118.00 83 110.00 153.00
10 73.20 32.22 47 94.30 107.00 84 112.00 158.00
11 71.90 28.32 48 94.50 123.00 85 108.50 183.00
12 75.00 43.86 49 79.70 65.92 86 104.00 184.00
13 73.10 38.21 50 79.30 81.29 87 111.00 121.00
14 79.00 42.48 51 89.80 111.00 88 108.50 159.00
15 77.00 30.96 52 83.80 90.73 89 121.00 245.00
16 68.85 55.78 53 85.20 133.00 90 109.00 137.00
17 75.95 43.78 54 75.50 41.90 91 97.50 165.00
18 74.15 33.41 55 78.40 41.71 92 105.50 152.00
19 73.80 43.35 56 78.60 58.16 93 98.00 181.00
20 75.90 29.31 57 87.80 88.85 94 94.50 80.95
21 76.85 36.60 58 86.30 155.00 95 97.00 137.00
22 80.90 40.25 59 85.50 70.77 96 105.00 125.00
23 79.90 35.43 60 83.70 75.08 97 106.00 241.00
24 89.20 60.09 61 77.60 57.05 98 99.00 134.00
25 82.00 45.84 62 84.90 99.73 99 91.00 150.00
26 92.00 70.40 63 79.80 27.96 100 102.50 198.00
27 86.60 83.45 64 108.30 123.00 101 106.00 151.00
28 80.50 84.30 65 119.60 90.41 102 109.10 229.00
29 86.00 78.89 66 119.90 106.00 103 115.00 253.00
30 82.50 64.75 67 96.50 144.00 104 101.00 188.00
31 83.50 72.56 68 105.50 121.00 105 100.10 124.00
32 88.10 89.31 69 105.00 97.13 106 93.30 62.20
33 90.80 78.94 70 107.00 166.00 107 101.80 133.00
34 89.40 83.55 71 107.00 87.99 108 107.90 208.00
35 102.00 127.00 72 101.00 154.00 109 108.50 208.00
36 94.50 121.00 73 97.00 100.00
37 91.00 107.00 74 100.00 123.00
Source: Data provided courtesy of Jean-Pierre Despres, Ph.D.