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The mean annual inventory turnover rate of a random sample of 24 convenience stores was found to be 3.8 times per annum. Assume that the population standard deviation is 0.6 and that the annual inventory turnover rate amongst convenience stores is normally distributed.

(a) Calculate the actual average annual inventory turnover rate, with 90% confidence, for all convenience stores. (Use the z-table.) Interpret the result.

(b) Compute (a) using Excel's NORMSINV formula to find the z-value.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91699384

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