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(a) Drivers in an urban region have commute times in minutes) that are distributed around an unknown mean, with a standa
Posted: Thu Apr 28, 2022 7:30 am
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- A Drivers In An Urban Region Have Commute Times In Minutes That Are Distributed Around An Unknown Mean With A Standa 1 (38.2 KiB) Viewed 37 times
(a) Drivers in an urban region have commute times in minutes) that are distributed around an unknown mean, with a standard deviation of 10 minutes. The commute times are recorded for a random sample of 32 drivers. An average value of 32 minutes is obtained. What is the 99.9 % confidence interval for the population mean estimate? Low end: High end: Submit Answer Tries 0/2 (b) What is the confidence interval if the sample size is doubled, using the same confidence level and sample mean? Low end: High end: Submit Answer Tries 0/2 (c) What should the sample size be if the margin of error is to be reduced to half the margin of error obtained in (a), using the same confidence level and sample mean? Answer: Submit Answer Tries 0/2