Data Set 26 “Cola Weights and Volumes” in Appendix B includes the weights (in pounds) of cola for a sample of cans of regular Coke (n = 36, x̅ = 0.81682 lb, x = 0.00751 lb) and the weights of cola for a sample of cans of Diet Coke (n = 36, x̅ = 0.78479 lb, x = 0.00439 lb). Use a 0.05 significance level to test the claim that variation is the same for both types of Coke.

Data Set 26: Cola Weights and Volumes 

Data are from 144 cans of cola (first five rows shown here). WT is weight in pounds and VOL is volume in ounces.