Question: Construct a 90% confidence interval for 1 - 2. Two samples are randomly selected from normal populations. The sample statistics are given below. Assume that

Construct a 90% confidence interval for 1 - 2. Two samples are randomly selected from normal populations. The sample statistics are given below. Assume that 21 = 22. n1 = 10 n2 = 12 x1 = 25 x2 = 23 s1 = 1.5 s2 = 1.9

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