Question

Find the minimum sample size n needed to estimate ? for the given values of c, o, and E. cz 0.90, ?: 7.7, and E: 2 Assume that a preliminary sample has at least 30 members n(Round up to the nearest whole number)

Answer 1

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Given c = 0.90 alpha = 1 - 0.90 = 0.10 alpha/2 = 0.05 (from Normal standard table) Z_alpha/2 = 1.645 eta = [Z_alpha/2 2/f)^2 = [1.645 * 7.7/2]^2 = 40.11006 cong 41

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