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If the manager of a bottled water distributor wants to estimate, with 95% confidence, the mean amount of water in a 1-gallon bottle to within
If the manager of a bottled water distributor wants to estimate, with 95% confidence, the mean amount of water in a 1-gallon bottle to within 0.004 gallons and also assumes that the standard deviation is 0.02 gallon, what sample size is needed?
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