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12-12-2022
Mathematics

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Construct a 90% confidence interval for mu_{1} - mu_{2} Two samples are randomly selected from normal populations. The sample statistics are given below. Assume that sigma_{1} ^ 2 = sigma_{2} ^ 2; n_{1} = 10 , n 2 =12,; overline x 1 =25; x 2 =23,; s_{1} = 1.5, s_{2} = 1.9

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