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A company manufacturing tennis balls tested a Radom sample of 45 balls from the last shift resulting in a mean bounce height of 54.2 inches.

A company manufacturing tennis balls tested a Radom sample of 45 balls from the last shift resulting in a mean bounce height of 54.2 inches. You may assume the population standard deviation is 0.35 inch for bounce height. What sample size would be required to estimate the mean bounce height of the tennis balls to within 0.1 inch with 95% confidence

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