Question: An entomologist wishes to estimate the average development time of the citrus red mite correct to within .5 day. From previous experiments it is known

An entomologist wishes to estimate the average development time of the citrus red mite correct to within .5 day. From previous experiments it is known that σ is approximately 4 days. How large a sample should the entomologist take to be 95% confident of her estimate?

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