% -*- texinfo -*- % @deftypefn {Function File} {[@var{pval}, @var{z}] =} prop_test_2 (@var{x1}, @var{n1}, @var{x2}, @var{n2}, @var{alt}) % If @var{x1} and @var{n1} are the counts of successes and trials in % one sample, and @var{x2} and @var{n2} those in a second one, test the % null hypothesis that the success probabilities @var{p1} and @var{p2} % are the same. Under the null, the test statistic @var{z} % approximately follows a standard normal distribution. % % With the optional argument string @var{alt}, the alternative of % interest can be selected. If @var{alt} is @code{'~='} or % @code{'<>'}, the null is tested against the two-sided alternative % @var{p1} ~= @var{p2}. If @var{alt} is @code{'>'}, the one-sided % alternative @var{p1} > @var{p2} is used. Similarly for @code{'<'}, % the one-sided alternative @var{p1} < @var{p2} is used. % The default is the two-sided case. % % The p-value of the test is returned in @var{pval}. % % If no output argument is given, the p-value of the test is displayed. % @end deftypefn

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