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A recent report indicated an average family of four (2 parents and 2 children under the age of 16), spends $500 per month on gasoline. Assume the distribution of gasoline consumption expenditures for a family of four (2 parents and 2 children under the age of 16) follows the normal distribution, with a standard deviation of $75 per month. Round your answer to 2 decimals.

a. What percent of families spend more than $450 but less than $500?

b. What percent of the families spend less than $425?

c. What percent spends between $425 and $575?

d. What percent spends between $575 and $650?

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Statistics and Probability, Statistics

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