Question: In a test for the difference between two proportions, the sample sizes were n1 = 120 and n2 = 85, and the numbers of events

In a test for the difference between two proportions, the sample sizes were n1 = 120 and n2 = 85, and the numbers of events were x1 = 55 and x2 = 45.

A test is made of the hypotheses H0: p1 = p2 versus H1: p1 ≠ p2.

a. Compute the value of the test statistic.

b. Can you reject H0 at the α = 0.05 level of significance?

c. Can you reject H0 at the α = 0.01 level of significance?

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a To compute the value of the test statistic we need to use the formula z p1 p2 sqrtp11p1n1 p21p2n2 ... View full answer

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