Estimate the mean length of fish in a large lake

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Question: A wildlife manager wishes to estimate the mean length of fish in a large lake, to within one inch, with 80% confidence. Estimate the minimum size sample required. In his experience virtually no fish caught in the lake is over 23 inches long, so using the Empirical Rule he will estimate σ by one-sixth the range, or 23/6 = 3.8.

Reference no: EM131813572

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