(A) What Sample Size Would Be Required for the Production

question 87

Essay

(A) What sample size would be required for the production personnel to be approximately 95% sure that their estimate of the average number of errors per issue is within 4 errors of the true mean? Assume that the editor's best estimate of the population standard deviation ( ) is 10 errors per issue.
(B) How does your answer to (A) change if the editor wants the estimate to be within 3 errors of the actual population mean? Explain the difference in your answers to (A) and (B).

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