The pooled proportion estimate is used when the proportion of successes from sample 1 equals the proportion of successes from sample 2.

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The pooled proportion estimate is used to combine information from two samples to get an overall estimate of the proportion in the entire population, not necessarily because the proportions of successes in the two samples are equal. It is often used in hypothesis testing for comparing two proportions.

The Pooled Proportion Estimate Is Used When the Proportion of Successes