Decide whether the normal sampling distribution can be used. If it can be used, test the claim about the population proportion p at the given level of significance a using the given sample statistics. Claim: p#0.27; a=0.05; Sample statistics: p=0.21, n= 100

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A: Given,p⏞=0.19n=200α=0.05H0: p=0.22H1:  p≠0.22

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A: np =200*0.21=42 nq = 200*0.79=158

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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.