Estimate the minimum size sample using empirical rule

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Question: An economist wishes to estimate, to within six months, the mean time between sales of existing homes, with 95% confidence. Estimate the minimum size sample required. In his experience virtually all houses are re-sold within 40 months, so using the Empirical Rule he will estimate σ by one-sixth the range, or 40/6 = 6.7.

Reference no: EM131813577

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