Data Set 26 “Cola Weights and Volumes” in Appendix B includes volumes of the contents of cans of regular Coke (n = 36, x̅ = 12.19 oz, s = 0.11 oz) and volumes of the contents of cans of regular Pepsi (n = 36, x = 12.29 oz, s = 0.09 oz).

a. Use a 0.05 significance level to test the claim that cans of regular Coke and regular Pepsi have the same mean volume.

b. Construct the confidence interval appropriate for the hypothesis test in part (a).

c. What do you conclude? Does there appear to be a difference? Is there practical significance?

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PEPSI DIET WT PEPSI DIET VOL COKE REG WT 0.8192 0.8150 0.8163 0.8211 0.8181 COKE REG VOL 12.3 12.1 122 12.3 122 COKE DIET WT 0.7773 0.7758 0.7896 0.7868 0.7844 COKE DIET VOL 12.1 12.1 12.3 12.3 12.2 PEPSI REG WT 0.8258 0.8156 0.8211 0.8170 0.8216 PEPSI REG VOL 12.4 12.2 12.2 12.2 12.2 12.2 12.2 0.7868 0.7846 0.7938 0.7861 12.2