Exhibit 11-7 We want to test the hypothesis that population A has a larger variance than population B.
-Refer to Exhibit 11-7. The test statistic for this problem equals
A)0.4132
B)1.96
C)2.42
D)1.645

Question

Exhibit 11-7  We want to test the hypothesis that population A has a larger variance than population B.
-Refer to Exhibit 11-7. The test statistic for this problem equals
A)0.4132 
B)1.96 
C)2.42 
D)1.645

Quizplus · Accepted Answer

The test statistic for testing whether population A has a larger variance than population B is calculated using the F-distribution. From the exhibit, the degrees of freedom for population A is 12 and the degrees of freedom for population B is 9. The calculated F-statistic is 2.42, which falls in the rejection region at a significance level of 0.05, meaning we reject the null hypothesis in favor of the alternative and conclude that population A has a larger variance than population B.

Exhibit 11-7 We Want to Test the Hypothesis That