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A marketing firm wants to estimate how much root beer the average teenager drinks per year. A previous study found a standard deviation of

A marketing firm wants to estimate how much root beer the average teenager drinks per year. A previous study found a standard deviation of 113 liters. How many teenagers must the firm interview in order to have a margin of error of at most 0.3 liter when constructing a 99% confidence interval? Multiple Choice 0339 94 94.39 95

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