Assembly line workers are randomly assigned to two groups with 21 workers in each group. Each group receives a different training program and then their scores on an assembly task are compared. The "F" statistic for the variance in the two groups is 0.178. Using a 0.05 level of significance, what are the critical values for rejecting the null hypothesis that there is no difference in the variance of these two populations?
A. If F < 2.46 and F > 0.407, reject Ho
B. If F > 2.46 or F < 0.407, reject Ho
C. If F < 2.12 and F > 0.472, reject Ho
D. If F > 2.12 or F < 0.472, reject Ho
This solution provides a brief explanation for finding critical values for rejecting null hypothesis.