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construct a 95% confidence interval for u1 - u2. Two samples are randomly selected from normal populations. The (6) sample statistics are (1) n1 =

construct a 95% confidence interval for u1 - u2. Two samples are randomly selected from normal populations. The (6) sample statistics are (1) n1 = 10. (2) n2 = 12. (3) x1 = 25. (4) x2 = 23. (5) s1 = 1.5. (6) s2 = 1.9

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