A marketing firm wants to estimate how much root beer the average teenager drinks per year. A previous study found a standard deviation of 1.19
A marketing firm wants to estimate how much root beer the average teenager drinks per year. A previous study found a standard deviation of 1.19 liters. How many teenagers must the firm interview in order to have a margin of error of at most Of liter when constructing a 99% confidence interval? Multiple Choice O 940 O 939.39 O 939 O 938.39
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