20 pts to whoever helps!!
The tests in a specific professor's statistic courses have scores with a standard deviation equal to 14.1. One of his last classes had 27 test scores with a standard deviation of 9.3. Use a 0.01 significance level to test the claim that this last class has less variation than previous classes. Find the critical value(s) needed to test the claim.
a. 12.198, 45.642
b. 11.160
c. 12.198
d. 11.160, 48.290
