An ASCII data file with 4 variables per record as
seen in "sample data set". The four variables,
id, score, group indicator and stratum need to be
space delimited and arranged in the above order.
The group indicator needs to be 1 and 2. The
stratum needs to be a numeric variable.
To test run this macro, copy the program and sample
data set into your computer, in the end of the
program, add:
%stratify_cluswilcox(data=stratum.dat);
then run it. See "sample output" for resutls.