One gallon of gas is put into each of 30 test cars. The resulting gas-mileage values of 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?

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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 (28.1, 28.9)
O (28.42, 28.58)
O (27.3, 29.7)
O (28.46, 28.54).
O(27.36, 29.64)
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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 (28.1, 28.9) O (28.42, 28.58) O (27.3, 29.7) O (28.46, 28.54). O(27.36, 29.64) > Next Question Type here to search F5 F6 F7 F8 F9 F10 F11 F1 F2 F3 F4 23 %24 & 3 4. 8 W R T Y S H J K L C V B N M FL D
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