He contents of cans of Diet Coke (n = 36 , x ¯ = 0.78479 l b , s = 0.00439 l b) and of the contents of cans of regular Coke (n = 36 , x ¯ = 0.81682 l b , s = 0.00751 l b). (a) Use a 0.05 significance level to test the claim that the contents of cans of Diet Coke have weights with a mean that is less than the mean of regular Coke. (b) Construct the confidence interval appropriate for the hypothesis test in part (a) (c) Can you explain why cans of Diet Coke would weigh less than cans of regular Coke?