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An entomologist wishes to estimate the average development time of the citrus red mite accurate to...

An entomologist wishes to estimate the average development time of the citrus red mite accurate to within 0.14 days using a 92% confidence interval. From previous experiments it is known that this development time is at least 5 days, and cannot be more than 11 days. How large a sample should the entomologist take?
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