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# The Test that a Proportion is .50 and the Sign Test

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The Test that a Proportion is .50 and the Sign Test book

# The Test that a Proportion is .50 and the Sign Test

DOI link for The Test that a Proportion is .50 and the Sign Test

The Test that a Proportion is .50 and the Sign Test book

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## ABSTRACT

The fact that in many human populations the sexes are about equally divided leads to the relevance of the P = .50 test in studies of sex differences. Thus, if an investigator is interested in the relationship between sex and a definable characteristic (say, falling into a given psychiatric diagnostic group

or a political party), he can draw a random sample of a group having the characteristic and test the null hypothesis that the proportion of males is .50. Departure from .50 is taken as evidence for a sex difference in incidence of the characteristic, and therefore a relationship between sex and the characteristic.