Question: Given = 0.85, n1 = 400, = 0.90, n2 = 350, construct a 90% confidence interval for the difference between the population proportions.

Given = 0.85, n1 = 400, = 0.90, n2 = 350, construct a 90% confidence interval for the difference between the population proportions. Is there a difference between the population proportions at the 10% significance level? Explain.

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