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A fast food restaurant wants to know how much an automated beverage machine dispenses with each use. They have data that says at the medium

A fast food restaurant wants to know how much an automated beverage machine dispenses with each use. They have data that says at the medium setting the automated machine dispenses with a standard deviation of 17 ml. The manager wants to estimate the amount dispensed with a margin of error of 5ml. With a 95% confidence what minimum sample size should the fast food restaurant obtain. (remember units)

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