What sample size should be used

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The Department of Tourism in the state of California wants to know about hunters in the state: how much ($) do they spend on average each year for food and lodging while on hunting trips. The Director wants the estimate to be within ±$15 of the true value (population mean). She also wants to be 97.7% confident that the confidence interval you construct will contain the parameter. Prior studies indicate that the variance (i.e., the square of standard deviation) in annual spending is about $135. What sample size should be used?

Reference no: EM132399858

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