1a) Gasoline UseA random sample of25 drivers used on average746gallons of gasoline per year. The standard deviation of the population is29 gallons. Use graphing calculator. Find the95% confidence interval of the mean for all drivers. Round the answers to the nearest whole number.

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1b) Day Care TuitionA random sample of51 four-year-olds attending day care centers provided a yearly tuition average of$3982 and the population standard deviation of$637.

Find the90% confidence interval of the true mean. Round your answers to the nearest whole number.

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