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The average price of a gallon of unleaded regular gasoline was reported to be $3.44 in northern Kentucky. Use this price as the population mean,
The average price of a gallon of unleaded regular gasoline was reported to be $3.44 in northern Kentucky. Use this price as the population mean, and assume the population standard deviation is $0.30.
a) What is the probability that the mean price for a sample of 50 service stations is within $.06 of the population mean?
b) What is the probability that the mean price for a sample of 100 service stations is within $.06 of the population mean?
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