We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the avera

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We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the avera

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We Intend To Estimate The Average Driving Time Of A Group Of Commuters From A Previous Study We Believe That The Avera 1
We Intend To Estimate The Average Driving Time Of A Group Of Commuters From A Previous Study We Believe That The Avera 1 (50.24 KiB) Viewed 20 times
We intend to estimate the average driving time of a group of commuters. From a previous study, we believe that the average time is 42 minutes with a standard deviation of 19 minutes. We want our 99% confidence interval to have a margin of error of no more than plus or minus 2 minutes. What is the smallest sample size? Hint: Don't forget that if you are using the formulas, your answer must be a whole number, rounded up.
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