Question

A car manufacturer is testing whether there is a difference between the mean gas mileage for small and compact cars. For a sample of ?? small cars the mean obtained was ????? and for a sample of ?? compact cars the mean obtained was ?????. Gas mileage for small cars has a variance of ??. ???? while compact cars has a variance of ?. ????. Test this hypothesis using ?. ?? level of significance.

Answer 1

To Test :-

H0 :-  

H1 :-  

Test Statistic :-


Z = 3.8012

Test Criteria :-
Reject null hypothesis if


Result :- Reject Null Hypothesis

There is sufficient evidence to support the claim that  there is a difference between the mean gas mileage for small and compact cars.