Given two independent random samples with the following results: Answer: n₁ = 12 x₁ = 143 = 32 S1 Use this data to find the 99% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Answer: - Step 1. Find the point estimate that should be used in constructing the confidence interval. n₂ = 7 x₂ = 165 S2 = 21 Answer: Lower endpoint: Step 2. Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places. Step 3. Construct the 99% confidence interval. Round your answers to the nearest whole number. Upper endpoint:

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