The data set MIGRAINE contains hypothetical data for a clinical trial
of migraine treatment. Subjects of both genders either receive new drug therapy
or a placebo. Their response to treatment is coded as better or the same.
The data are recorded as cell counts instead of as one observation per subject.
The variable Frequency contains the frequencies for each treatment and response
options nodate pageno=1 linesize=80 pagesize=60;
input Gender $ Treatment $ Improve $ Frequency @@;
female Active Better 16 female Active Same 11
female Placebo Better 5 female Placebo Same 20
male Active Better 12 male Active Same 16
male Placebo Better 7 male Placebo Same 19