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Bell Shaped Distribution

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A random sample of 40 gas stations in Baton Rouge after Hurricane Katrina resulted in a mean price of $3.02 per gallon with a standard deviation of $0.07. A histogram of the data indicated that the data followed a bell shaped distribution.

A) What percentage of the gas stations have prices that range from $2.88 to $3.16

B) What percentage of the gas stations have prices within one deviation of the mean?

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