A mileage test is conducted for a new car model, the Pizzazz. Thirty (n-30) random selected...

  

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A mileage test is conducted for a new car model, the "Pizzazz." Thirty (n-30) random selected Pizzazzes are driven for a month and the mileage is carefully measured in each. The mean mileage for the sample is 28.6 miles per gallon (mpg) and the sample standard deviation is 2.2 mpg. Estimate a 95% confidence interval for the mean mpg in the entire population of Pizzazzes (you might need to round your answer a little bit to agree with mine). (a) (23.42, 33.84) (b) (27.81, 29.39) (c) (26.82, 30.47) (d) (27.23, 30.03) (e) None of the above A mileage test is conducted for a new car model, the "Pizzazz." Thirty (n-30) random selected Pizzazzes are driven for a month and the mileage is carefully measured in each. The mean mileage for the sample is 28.6 miles per gallon (mpg) and the sample standard deviation is 2.2 mpg. Estimate a 95% confidence interval for the mean mpg in the entire population of Pizzazzes (you might need to round your answer a little bit to agree with mine). (a) (23.42, 33.84) (b) (27.81, 29.39) (c) (26.82, 30.47) (d) (27.23, 30.03) (e) None of the above