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(a) What minimum percentage of gasoline stations had prices within 4 standard deviations of the mean? (c) What is the minimum percentage of gasoline stations

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(a) What minimum percentage of gasoline stations had prices within 4 standard deviations of the mean? (c) What is the minimum percentage of gasoline stations that had prices between $2.91 and $3.21 ? (a) At least 6 of gasoline stations had prices within 4 standard deviations of the mean. (Round to two decimal places as needed.)

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