Question

With gasoline prices increasing, drivers are more concerned with their cars’ gasoline consumption. For the past 5 years a driver has tracked the gas mileage of his car and found that the variance from fill-up to fill-up was σ2 = 23 mpg2. Now that his car is 5 years old, he would like to know whether the variability of gas mileage has changed. He recorded the gas mileage from his last eight fill-ups; these are listed here. Conduct a test at 10% significance level to infer whether the variability haschanged.


$1.99
Sales4
Views324
Comments0
  • CreatedFebruary 03, 2015
  • Files Included
Post your question
5000