My Math Forum intro stats, trucker confidence interval

 March 25th, 2012, 02:23 PM #1 Newbie   Joined: Jan 2012 Posts: 6 Thanks: 0 intro stats, trucker confidence interval How do I solve this problem? According to a study of 90 truckers, a trucker drives, on average, 540 miles per day. If the standard deviation of the miles driven per day for the population of truckers is 40, find the 99% confidence interval of the mean number of miles driven per day by all truckers?
 March 26th, 2012, 01:59 AM #2 Senior Member   Joined: Apr 2011 From: USA Posts: 782 Thanks: 1 Re: intro stats, trucker confidence interval You really should have all the equations you need in your book to solve this. Have you at least made some attempt at it? Or specific what about it you don't understand.

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### according to a study of 90 truckers, a trucker drives, on average, 540 miles per day. if the standard deviation of the miles driven per day for the population of truckers is 40, find the 95% confidence interval of the mean number of miles driven per

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