Hypermiler Wayne Gerdes drives a 2005 Honda Accord The EPA f

Hypermiler Wayne Gerdes drives a 2005 Honda Accord. The EPA fuel economy standard for that car estimates it at 21 MPG for combined city/highway driving. However we all know that \"your mileage may vary\", due to a combination of factors such as driving speed, weather conditions, altitude, fuel quality, engine break-in, tire pressure and other influences. Suppose that the EPA rating represents the mean value, with a standard deviation of plus or minus 2.3 MPG. Use this information to answer the following questions, worth 2 pts each.

6. Determine the range of values within one standard deviation of the mean.

7. Determine the range within which you would expect to find the average fuel economy of about 99.7% of \'05 Honda Accords.

8. What fuel economy would Wayne need to achieve to get a higher MPG than about 99.85% of other \'05 Accord drivers?

9. If my 2005 Accord is averaging 16.4 MPG, about what percentage of \'05 Accords am I doing better than?

10. Wayne Gerdes is getting 59 MPG from his \'05 Accord. Would this value be considered an outlier? Why or why not?

Solution