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Large Sample Test for a Difference in Two Proportions

  • When testing the difference between two proportions, p1p2, a pooled estimate of the population proportion must be created.

  • The pooled proportion, p, is the total number of successes in the two samples divided by the total sample size between the two samples.

  • The test statistic is

    .

Large Sample Test for a Difference in Two Proportions

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Mathematics: AP Statistics