(b) What percentage of regular grade gasoline sold between $2.68 and $3.88 per gallon? Recall the...

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(b) What percentage of regular grade gasoline sold between $2.68 and $3.88 per gallon? Recall the following information about the empirical rule. Empirical Rule For data having a bell-shaped distribution: • Approximately 68% of the data values will be within one standard deviation of the mean. • Approximately 95% of the data values will be within two standard deviations of the mean. • Almost all of the data values will be within three standard deviations of the mean. This is represented graphically below. Note that a value of 0 standard deviations corresponds to the mea mean. almost all -3 -2 -1 95% 68% 0 1 2 لیا N Now we are to determine the percentage of gas that sold between $2.68 and $3.88 per gallon. It was already determined that $2.68 is 2 standard deviations below the mean of $3.48. How many standard deviations above the mean is $3.88? (b) What percentage of regular grade gasoline sold between $2.68 and $3.88 per gallon? Recall the following information about the empirical rule. Empirical Rule For data having a bell-shaped distribution: • Approximately 68% of the data values will be within one standard deviation of the mean. • Approximately 95% of the data values will be within two standard deviations of the mean. • Almost all of the data values will be within three standard deviations of the mean. This is represented graphically below. Note that a value of 0 standard deviations corresponds to the mea mean. almost all -3 -2 -1 95% 68% 0 1 2 لیا N Now we are to determine the percentage of gas that sold between $2.68 and $3.88 per gallon. It was already determined that $2.68 is 2 standard deviations below the mean of $3.48. How many standard deviations above the mean is $3.88?

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Answer 1 a The mean price of regular grade gasoline is 329 per ... View the full answer