is assumed to be normally distributed with a standard deviation of 15.2 miles. If a sample of n= 125 drivers yielded a sample mean of 185.6 miles driven, find each of the following confidence intervals for u, the mean number of miles driven per night by a delivery driver. (a) 90% confidence interval (b) 98% confidence interval

MATLAB: An Introduction with Applications
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14) The number of miles driven by an overnight delivery driver
is assumed to be normally distributed with a standard deviation
of 15.2 miles. If a sample of n= 125 drivers yielded a sample
mean of 185.6 miles driven, find each of the following
confidence intervals for u, the mean number of miles driven per
night by a delivery driver.
(a) 90% confidence interval
(b) 98% confidence interval
(c) 80% confidence interval.
Transcribed Image Text:14) The number of miles driven by an overnight delivery driver is assumed to be normally distributed with a standard deviation of 15.2 miles. If a sample of n= 125 drivers yielded a sample mean of 185.6 miles driven, find each of the following confidence intervals for u, the mean number of miles driven per night by a delivery driver. (a) 90% confidence interval (b) 98% confidence interval (c) 80% confidence interval.
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