Statistics: Calculating Confidence Intervals – #98


Question: In a recent survey of 50 apartments residents, 32 had microwave ovens. In a survey of 60 homeowners, 24 had microwave ovens. At a significance level of 0.05, test the claim that the proportions are equal. Find the 95% confidence interval for the difference of the two proportions.

State the hypotheses and identify the claim, find the critical value(s), compute the test value, make the decision and summarize the results.

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