Difference between the two population means, Basic Statistics

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Difference between the two population means

Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Independent samples from two different populations yield the following data. 1 = 236, 2 = 905, = 88 = 13 The sample size is 381 for both samples. Find the 85% confidence interval for ??

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Basic Statistics: Difference between the two population means

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