关于SPSS中Mann-Whitney Test

yamanda

yamanda

初级会员
组别 变量1 变量2
1 10.48 24.26
2 14.64 32.13
3 12.87 28.97
4 16.57 36.47
5 17.84 34.81

用nonparametric test 中的Mann-Whitney Test 分别检验上表每两组的这两个变量有无显著性差异,可是每次的sig.都是0.317,但1组和5组的差异很明显啊

Mann-Whitney U .000 .000
Wilcoxon W 1.000 1.000
Z -1.000 -1.000
Asymp. Sig. (2-tailed) .317 .317
Exact Sig. [2*(1-tailed Sig.)] 1.000(a) 1.000(a)
a Not corrected for ties.
b Grouping Variable: zujie

换一组数据试一下也一样情况,为什么会这样呢?

还有,用two independent samples test和K independent samples test 检验两变量是否有显差,结果一个没有一个有,哪一才是正确的呢?

请教!!
 
回复: 关于SPSS中Mann-Whitney Test

The differences between Variable 1 and Variable 2 in this dataset as whole are not statistically significant. You should look att eh relationship between the two variables instead of variable 1 or 2 between different groups alone. Other tests such as LL also show no significance.
 
回复: 关于SPSS中Mann-Whitney Test

谢谢肖博士!!
您的意思是我应该注意两变量之间的相关关系而非每个变量内部的差异是吗.
可是我总觉得比如1组和5组的差异好象挺大的.:)
Thanks again!
 
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