One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of the sample are computed with mean of 28.5 gallons per mile, and standard deviation of 1.2 miles per gallon. What is the 95% confidence interval estimate of the mean mileage? O 28.42 < u < 28.58 miles per gallon 28.1 < µ < 28.9 miles per gallon O 28.46 < u < 28.54 miles per gallon O 27.3 < u < 29.7 miles per gallon O 27.36 < µ < 29.64 miles per gallon

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One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of the sample are
computed with mean of 28.5 gallons per mile, and standard deviation of 1.2 miles per gallon. What is the
95% confidence interval estimate of the mean mileage?
O 28.42 < µ < 28.58 miles per gallon
O 28.1 < µ < 28.9 miles per gallon
O 28.46 < µ < 28.54 miles per gallon
O 27.3 < µ < 29.7 miles per gallon
O 27.36 < µ < 29.64 miles per gallon
Transcribed Image Text:One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of the sample are computed with mean of 28.5 gallons per mile, and standard deviation of 1.2 miles per gallon. What is the 95% confidence interval estimate of the mean mileage? O 28.42 < µ < 28.58 miles per gallon O 28.1 < µ < 28.9 miles per gallon O 28.46 < µ < 28.54 miles per gallon O 27.3 < µ < 29.7 miles per gallon O 27.36 < µ < 29.64 miles per gallon
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