% There are 22 subjects in a clinical trial and 9 are females.
% There are 11 portions of drug and 11 placebos. Only
% 2 females received drug.
% Are the proportions of males and females assigned to a drug
% (statistically) equal?
% That is, is the assignment of drug homogeneous wrt gender.
a = 2; b = 7; c = 9; d =4;
n=a + b + c + d;
T = a;
pval = hygecdf(T,n,a+c,a+b) %H1: p1 p2 pval=0.9962
pa = hygepdf(T,n,a+c,a+b);
for i = 1:min(a+b, a+c)+1
p(i) = hygepdf(i-1,n,a+c,a+b) ;
end
pval2 = sum(p(p <= pa)) %H1: p1 ~= p2 pval2=0.1179