populations that are approximately normally distributed. A 99% confidence interval for μ₁ −μ₂ using the sample results x₁ = 505, s₁ = 111,n₁ = 380 and ₂ = 424, s2 = 91, n₂ = 200 Enter the exact answer for the best estimate and round your answers for the margin of error and the confidence interval to two decimal places. Best estimate i Margin of error = i Confidence interval: i to i

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