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April 19, 2014

Homework Help: Statistics

Posted by Terra on Thursday, January 12, 2012 at 5:30pm.

The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard deviation 0.15 grams per mile .

(a) What sample size is needed so that the standard deviation of the sampling distribution is 0.01 grams per mile ?

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