For testing the difference between two population proportions,the pooled proportion estimate is found by taking:
A)the proportion of successes from sample 1 plus the proportion of successes from sample 2.
B)the total number of successes in both samples divided by the total of both sample sizes.
C)the difference between the proportion of successes in each sample.
D)None of these choices.

Question

Quizplus · Accepted Answer

The pooled proportion estimate is found by calculating the total number of successes in both samples and dividing it by the total of both sample sizes. This gives us an estimate of the proportion of successes for the combined population. This estimate is used to calculate the standard error and test for statistical significance between the two sample proportions. Option A is incorrect because we cannot simply add the proportions from each sample as this will not give us an accurate estimate. Option C is incorrect because it does not involve calculating a pooled proportion estimate. Option D is incorrect because there is a correct choice.

For Testing the Difference Between Two Population Proportions,the Pooled Proportion