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How many commuters should be randomly selected to estimate

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Reference no: EM13470787

How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 98% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 10 minutes.

A. 68

B. 136

C. 166

D. 97

Reference no: EM13470787

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