February 24, 2017

Homework Help: AP Stats (math)

Posted by Kyle on Sunday, April 7, 2013 at 10:17am.

A large metropolitan area found that the time it takes for people to commute to work has a mean of 20.5 minutes and a standard deviation of 15.4 minutes. What is the probability that a random sample of 40 people have a mean commute time greater than 25 minutes?

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