您好，这两者在 R 两种方式 Anova 测试中有什么区别：
anova(lm(StressReduction~Treatment*Gender))anova(lm(StressReduction~Treatment+Gender))
如您所见，第一个是“治疗*性别”，最后一个是“治疗+性别”
我应该使用哪一个？
Treatment Gender StressReduction
1 medical F 1
2 medical F 1
3 medical F 1
4 medical F 1
5 medical F 2
6 medical F 2
7 medical F 3
8 medical F 3
9 medical F 3
10 medical F 3
11 medical M 1
12 medical M 1
13 medical M 2
14 medical M 2
15 medical M 2
16 medical M 2
17 medical M 2
18 medical M 2
19 medical M 3
20 medical M 3
21 mental F 3
22 mental F 3
23 mental F 4
24 mental F 4
25 mental F 4
26 mental F 4
27 mental F 4
28 mental F 4
29 mental F 5
30 mental F 5
31 mental M 2
32 mental M 2
33 mental M 2
34 mental M 2
35 mental M 3
36 mental M 3
37 mental M 4
38 mental M 4
39 mental M 4
40 mental M 4
41 physical F 1
42 physical F 1
43 physical F 1
44 physical F 1
45 physical F 2
46 physical F 2
47 physical F 3
48 physical F 3
49 physical F 3
50 physical F 3
51 physical M 3
52 physical M 3
53 physical M 4
54 physical M 4
55 physical M 4
56 physical M 4
57 physical M 4
58 physical M 4
59 physical M 5
60 physical M 5