Refer to the comparison of the daily adult intake of selenium in two different regions
Chapter 8, Problem 8.76(choose chapter or problem)
Refer to the comparison of the daily adult intake of selenium in two different regions of the United States, in Exercise 8.61. Suppose that you wish to estimate the difference in the mean daily intake between the two regions, correct to within 5 g, with probability .90. If you plan to select an equal number of adults from the two regions (that is, if 1 = 2), how large should n1 and n2 be?
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