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April 25, 2015

Homework Help: Statistics

Posted by Jerome on Sunday, June 23, 2013 at 5:00pm.

According to the American Automobile Association (AAA), the mean cost of a gallon of regular unleaded fuel in 2007 was $2.835. AAA noted that the standard deviation of the fuel price was $0.15. A random sample of n=100 gas stations is selected and the mean gas price is analyzed.
What is the probability that the mean fuel cost is between $2.84 and $2.86?

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