Computers in some vehicles calculate various quantities related to performance.

Question

Computers in some vehicles calculate various quantities related to performance. One of these is the fuel efficiency, or gas mileage, usually expressed as miles per gallon (mpg). For one vehicle equipped in this way, the mpg was recorded each time the gas tank was filled, and the computer was then reset. Here are the mpg values for a random sample of 20 of these records: Describe the distribution using graphical methods. Is it appropriate to analyze these data using methods based on Normal distributions? Explain why or why not. Yes, it is appropriate to analyze these data using methods based on Normal distributions. There are no outliers and the data is skewed to the right. No, it is not appropriate to analyze these data using methods based on Normal distributions. These data are skewed to the left. No, it is not appropriate to analyze these data using methods based on Normal distributions. There are extreme outliers. Yes, it's appropriate to analyze these data using methods based on Normal distributions. There are no outliers and no particular. No, it is not appropriate to analyze these data using methods based on distributions. These data are skewed to the right. Find the mean. () mpg Find the standard deviation. (Round your answer to four decimal places.) mpg Find the standard error. (Round your answer to four decimal places.) mpg Find the margin of error for 95% confidence. (Round your answer to four decimal places.) mpg Report the 95% confidence interval for the mean mpg for this vehicle based on these data. (Round your answers to tour decimal places.) (mpg. mpg)

Explanation / Answer

Solution :-

1). (D) Yes, it is appropriate to analyze these data using the methods based on Normal distribution. There are no outliers and no particular skewness.

b).Mean: 43.12 (sum/count) Standard Deviation: 4.2760 SE of the mean: 0.9562

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