In testing the difference between two population proportions,we pool the two sample proportions to estimate the population proportion.

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When testing the difference between two population proportions, we do use the pooled sample proportion to estimate the population proportion. The pooled sample proportion is a weighted average of the two sample proportions, and it gives a more accurate estimate of the population proportion when the two population proportions are similar.

In Testing the Difference Between Two Population Proportions,we Pool the Two