統計p383-4 數據
sex color cotinine
1 male white 210
2 male white 300
3 male white 150
4 male white 325
5 male white 100
6 male black 245
7 male black 347
8 male black 125
9 male black 250
10 male black 260
11 female white 177
12 female white 300
13 female white 106
14 female white 150
15 female white 160
16 female black 252
17 female black 152
18 female black 315
19 female black 267
20 female black 275
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