Statistical Analysis for Education and Psychology Researchers

;
%macro kw;
%let alpha= 0.1; * ENTER
ALPHA LEVEL ON THIS LINE ;

****;
* DO NOT EDIT THE PROGRAM
BEYOND THIS LINE **;
proc datasets;
delete comps;
run;
*****;
kruskal-wallis test ;
*****;
proc nparlway data=a wilcoxon;
class group;
var response;
title 'Kruskal-Wallis test –
worked example';
run;

*;

• post hoc pairwise comparisons
  *;

  ---

  
  

  *;
  rank the data ;
  proc rank data=a out=b;
  var response;
  ranks rankresp;
  run;
  find the mean rank for each
  group and number in each group
  ;
  proc sort data=b; by group;
  proc means data=b noprint;
  by group;
  var rankresp;
  output out=rank mean=meanrank
  n=num;
  find total number of
  subjects ;
  data numsub;
  set a end=eof;
  if eof then do;
  totnum=n;
  output;
  end;
  find the total number of
  groups ;
  %global totgp;

  
  

Appendix 376