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Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean gallons of gasoline sold to his customers with 90%v
Bob Nale is the owner of Nale's Quick Fill. Bob would like to estimate the mean gallons of gasoline sold to his customers with 90%v confidence. Bob wants the margin of error to be less than 0.15. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 2.30 gallons. What is the required sample size?
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