To test the mileage efficiency of three new car models,random samples of various sample sizes were selected from each of the three cars and the mpg data obtained are shown below. Based on the sample date,one can conclude that
A)all three car models have the same mean mpg.
B)at least two car models have different mpgs.
C)Model C has a higher mpg than Model A.
D)None of the above

Question

To test the mileage efficiency of three new car models,random samples of various sample sizes were selected from each of the three cars and the mpg data obtained are shown below.  Based on the sample date,one can conclude that
A)all three car models have the same mean mpg. 
B)at least two car models have different mpgs. 
C)Model C has a higher mpg than Model A. 
D)None of the above

Quizplus · Accepted Answer

To determine if all three car models have the same mean mpg or not, we can perform an ANOVA test. However, we cannot make any conclusions about Model C having a higher mpg than Model A based on the sample data provided. The only conclusion we can make is that at least two car models have different mpgs, as there is variance in the sample means for each model.

To Test the Mileage Efficiency of Three New Car Models,random