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July 23, 2014

Homework Help: statistics

Posted by victoria on Monday, April 19, 2010 at 11:26am.

A used car dealership has found that the length of time before a major repair is required on the cars it sells is normally distributed with a mean of 10 months and a standard deviation of 3 months. If the dealer wants only 5 percent of the cars to fail before the end of the guarantee period for how many months should the cars be guaranteed?

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