Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: Re: interpretation


From   "Martyn Sherriff" <martyn.sherriff@kcl.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: interpretation
Date   Wed, 11 Jun 2003 14:27:29 +0100

I would be grateful for some advice or comments on this output from kwallis2
(Stata 8). On the basis of Kruskal-Wallis I would reject the null hypothesis
of no difference between regions, but the subsequent multiple comparison
indicate no significant differences between any of the regions.

Thanks,
Martyn

. kwallis2 score if q==13,by(region)
One-way analysis of variance by ranks (Kruskal-Wallis Test)
region   Obs   RankSum  RankMean 
--------------------------------
  1       48   4074.50     84.89
  2       17   1064.50     62.62
  3       62   4638.00     74.81
  4       20   1101.00     55.05
Chi-squared (uncorrected for ties) =     8.336 with    3 d.f. (p = 0.03956)
Chi-squared (corrected for ties)   =     9.424 with    3 d.f. (p = 0.02416)
Multiple comparisons between groups
-----------------------------------
(Adjusted p-value for significance is 0.004167)
Ho: score(region==1) = score(region==2)
    RankMeans difference =     22.27  Critical value =     31.70
    Prob = 0.031944 (NS)
Ho: score(region==1) = score(region==3)
    RankMeans difference =     10.08  Critical value =     21.60
    Prob = 0.109120 (NS)
Ho: score(region==1) = score(region==4)
    RankMeans difference =     29.84  Critical value =     29.90
    Prob = 0.004234 (NS)
Ho: score(region==2) = score(region==3)
    RankMeans difference =     12.19  Critical value =     30.75
    Prob = 0.147871 (NS)
Ho: score(region==2) = score(region==4)
    RankMeans difference =      7.57  Critical value =     37.06
    Prob = 0.295024 (NS)
Ho: score(region==3) = score(region==4)
    RankMeans difference =     19.76  Critical value =     28.89
    Prob = 0.035590 (NS)
All the groups are comparable from each other.


"The difference between winners and losers is that winners tell the jokes
and the losers talk about the run of the ball." 
 


I've stopped 3,059 spam messages. You can too!
One month FREE spam protection at http://www.cloudmark.com/spamnetsig/}


*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index