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A researcher want to determine an interval estimate for the average weight of adult gorillas...

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A researcher want to determine an interval estimate for the average weight of adult gorillas in pounds She wants to be 95 certain that she is within 5 7 of the true average From past studies it is known that the standard deviation of the weights of adult gorillas is 11 9 pounds What is the minimum sample size necessary to estimate the population mean Round your answer up to the next integer

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