In it's Fuel Ecoomy Guide, the Environmental Protection Agency gives a variety of data on 2016 model year vehicles. If outliers (hybrid, gas-electric or electric vehicles) are ignored, the combined city and highway gas mileage is approximately normally distributed with mean 23.0 mpg and standard deviation of 4.9 mpg. a.) A 2016 Volkswagen Beetle has an average gas mileage of 28mpg. What percentage of 2016 vehicles have a better mpg than the Volkswagen Beetle? b.) What is the probabilty that a 2016 model year vehicle has a gas mileage lower than 30 mpg? c.) Assume twenty 2016 model year vehicles are randomly selected. Describe the distribution of the variable x bar. I. Shape. You must justify (state how you know) your answer. II. Mean. III. Standard deviation. Round to three decimal places. d. ) Find the probabilty that the mean gas mileage of a sample of twenty 2016 model year vehicles is less than 24mpg.
In it's Fuel Ecoomy Guide, the Environmental Protection Agency gives a variety of data on 2016 model year vehicles. If outliers (hybrid, gas-electric or electric vehicles) are ignored, the combined city and highway gas mileage is approximately
a.) A 2016 Volkswagen Beetle has an average gas mileage of 28mpg. What percentage of 2016 vehicles have a better mpg than the Volkswagen Beetle?
b.) What is the probabilty that a 2016 model year vehicle has a gas mileage lower than 30 mpg?
c.) Assume twenty 2016 model year vehicles are randomly selected. Describe the distribution of the variable x bar.
I. Shape. You must justify (state how you know) your answer.
II. Mean.
III. Standard deviation. Round to three decimal places.
d. ) Find the probabilty that the mean gas mileage of a sample of twenty 2016 model year vehicles is less than 24mpg.
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