TABLE 12-15
Two new different models of compact SUVs have just arrived at the market.You are interested in comparing the gas mileage performance of both models to see if they are the same.A partial computer output for twelve compact SUVs of model 1 and thirteen of model 2 is given below: You are told that the gas mileage population distributions for both models are not normally distributed.
-Referring to Table 12-15,what is your conclusion on the test using a 5% level of significance?
A)There is not enough evidence of a difference in median gas mileage.
B)There is evidence of a difference in median gas mileage.
C)There is not enough evidence of a difference in mean gas mileage.
D)There is evidence of a difference in mean gas mileage.

Question

TABLE 12-15
Two new different models of compact SUVs have just arrived at the market.You are interested in comparing the gas mileage performance of both models to see if they are the same.A partial computer output for twelve compact SUVs of model 1 and thirteen of model 2 is given below:  You are told that the gas mileage population distributions for both models are not normally distributed.
-Referring to Table 12-15,what is your conclusion on the test using a 5% level of significance?
A)There is not enough evidence of a difference in median gas mileage. 
B)There is evidence of a difference in median gas mileage. 
C)There is not enough evidence of a difference in mean gas mileage. 
D)There is evidence of a difference in mean gas mileage.

Quizplus · Accepted Answer

The p-value is less than 0.05, so we reject the null hypothesis and conclude that there is evidence of a difference in median gas mileage.

TABLE 12-15 Two New Different Models of Compact SUVs Have Just Arrived