A Small Business Owner Has Two Fast Food Restaurants

Multiple Choice

A small business owner has two fast food restaurants. The owner wants to determine if there is any difference in the variability of service times at the drive-thru window of each restaurant. A sample of size n = 9 is taken from each restaurant's drive-thru window. To perform a hypothesis test using the 0.05 level of significance the critical value is:

A) 3.438
B) 3.197
C) 4.026
D) 4.433