SCENARIO 12-17
Three new different models of compact SUVs have just arrived at the market.You are interested in comparing the gas mileage performance of all three models to see if they are the same.A partial computer output for twelve compact SUVs of each model is given below:
You are told that the gas mileage population distributions for all three models are not normally distributed.
-Referring to Scenario 12-17,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

SCENARIO 12-17
Three new different models of compact SUVs have just arrived at the market.You are interested in comparing the gas mileage performance of all three models to see if they are the same.A partial computer output for twelve compact SUVs of each model is given below:
  You are told that the gas mileage population distributions for all three models are not normally distributed.
-Referring to Scenario 12-17,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

Without the specific details of Scenario 12-17, the correct answer cannot be determined based on the provided information. However, if the conclusion is that there is evidence of a difference in median gas mileage, it suggests that the statistical test conducted (likely a non-parametric test given the reference to median rather than mean) found a statistically significant difference in gas mileage at the 5% significance level. This would mean that the p-value obtained from the test was less than 0.05, leading to the rejection of the null hypothesis, which typically posits that there is no difference.

SCENARIO 12-17 Three New Different Models of Compact SUVs Have Just Arrived