Independent random samples from two normally distributed populations give the following results: nx = 15 x-bar =
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nx = 15 x-bar = 400 sx = 20
ny = 13 y-bar = 360 sy = 25
Assume that the unknown population variances are equal and find a 90% confidence interval for the difference between population means.
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Related Book For
Statistics For Business And Economics
ISBN: 9780132745659
8th Edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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