In testing the difference between two proportions using the normal distribution,we may use either a one-tailed chi-square test or a two-tailed Z test.

Name: In testing the difference between two proportions using the normal distribution,we may use either a one-tailed chi-square test or a two-tailed Z test.
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The chi-square test and Z test are related; both can be used to test differences in proportions, with chi-square often used for categorical data and Z test for comparing two sample proportions.

In Testing the Difference Between Two Proportions Using the Normal