Use the sample data below to test the hypotheses H0: p1 = p2 = p3 Ha: not all population proportions are equal   where pi is the population proportion of Yes responses for population i.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.