If the price of gasoline follows a normal distribution, has a mean of $2.30 per gallon, and a standard deviation of $0.10 per gallon. What percentage of gasoline is sold between $2.20 and $2.40 per gallon?

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Answer 1 · 2015-12-22T20:38:28

The range $2.20 to $2.40 is exactly #+-1# standard deviations from the mean.

According to the Empirical Rule, 68% of gasoline will be sold #+-1# standard deviations from the mean of $ 2.30 per gallon

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