On Testing the Equality of Two Proportions
STANFORD UNIV CA DEPT OF STATISTICS
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In a recent letter The American Statistician, May 1977, p. 97, Robbins raises the question of which of two procedures, the commonly-used one and an alternative one, is better for testing the equality of two binomial proportions. In an attempt to answer the question, both asymptotic and extensive exact calculations are performed. The results show that the usual procedure is superior in attaining nominal significance levels but that the alternative procedure is generally, though not uniformly, superior in power. Several other procedures are also considered briefly.
- Statistics and Probability