8.27 Independent random samples from two normally distributed populations give the following results: nx = 8 x
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8.27 Independent random samples from two normally distributed populations give the following results:
nx = 8 x = 77 sx = 6 ny = 13 y = 82 sy = 5
a. If we assume that the unknown population variances are equal, find the 90% confidence interval for the difference of population means.
b. If we do not assume that the unknown population variances are equal, find the 90% confidence interval for the difference between population means.
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Related Book For
Essential Mathematics And Statistics For Science
ISBN: 9780470694480
2nd Edition
Authors: Graham Currell, Dr. Antony Dowman
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