1) Kwallis2 works well in my Stata11.1

As regards to:
请问：  “kwallis2”输出的结果是有两两比较结果，请问该命令计算的是扩展的t检验还是 Nemenyi检验？谢谢
the following is a good answer from Paul F. Visintainer, PhD

A question about how -kwallis2- computes the adjusted critical level pops up occasionally (see http://www.stata.com/statalist/archive/2009-02/msg00379.html).  It seems as if the adjusted critical level is too conservative for a usual Bonferroni's adjustment, using alpha/(k(k-1)) rather than alpha/k.  (I even modified kwallis2 to use alpha/k adjustment).  Now, however, I believe that -kwallis2- is indeed using the correct adjustment.

Recently I had some data which I gave to a colleague who uses BMDP (remember BMDP?).  His output was virtually identical to -kwallis2-, using the alpha/(k(k-1)) adjustment.  The old BMDP manual (1992) states that the observed "Z is compared with the tabled Z[alpha*/2], where alpha* = 2alpha/(k(k-1)).    So, alpha*/2 = alpha/(k(k-1)), which is what -kwallis2- uses.

My interpretation of this is that the global K-W test is one-sided (e.g., a chi-square test where all squared deviations are positive), but the post-hoc pairwise comparisons are two-sided, either positive or negative deviations.  Another way of thinking about it is that if the conventional Bonferroni's adjustment were applied (alpha/k), the global test would be conducted at a critical level of 5%, but the post-hoc tests would be equivalent to computing adjusted 90% confidence intervals.


Paul F. Visintainer, PhD
Baystate Medical Center
280 Chestnut Street
Springfield, MA 01199

早，请问下你用的什么版本？确定可以做？
最后还是用spss20 做得

Mine: Stata SE 11.1
Kwallis2 is an old user-written ado. It should work for Stata 8-12

最近，在看复杂抽样，本科学得统计弱爆了。去网上再看看，ado文件夹里只有kwallis，手册manual里也没有

刚去下载了kwallis2 ado 文件，可以运行了。O(∩_∩)O谢谢
为什么我的ado文件夹里没有(⊙o⊙)？

for user-written commands, you can find and install using "findit", for example

findit kwallis2      

Then, follow the instructions

I got it ,thanks

请问下，你是否接触过stata 的  analyzing  complex sample survey data .
sudaan 免费下载的地址？
谢谢

正想着如何实现SPSS中的两两比较，数据粘贴来粘贴去甚是麻烦

太感谢了，我是13.1版本的，也是用findit才能找到kwallis2

Ho:xyz(culturegroup==1) = xyz(culturegroup==3)
Ho:RankMeans difference =    289.17 Critical value =    175.82
Prob = 0.000007 (S)
Ho:xyz(culturegroup==1) = xyz(culturegroup==4)
RankMeans difference =    346.19 Critical value =    367.81
Prob = 0.006511 (NS)
RankMeans difference、Critical value还有括号里S、NS有什么含义？ 求详细解释

请问stata里面，ranksum对应的是spss里面的Mann-Whitney U检验吗？Mann-Whitney U检验和
kwallis 检验的区别是什么，前者是2个因素的比较，后者是多个参数的比较？但是都是非参检验？非常感谢

如果X的组别为两组，比如男和女共两组，则应该使用MannWhitney统计量，如果组别超过两组，则应该使用Kruskal-Wallis统计量结果。SPSSAU自动为你选择MannWhitney或者Kruskal-Wallis统计量。非参数检验可以使用网页版SPSSAU进行操作。

我也有同样的疑惑。请问您解决了吗？