Listed below are weights (grams) from a simple random sample of "wheat" pennies (from Data Set 29 "Coin Weights" in Appendix B). U.S. Mint specifications now require a standard deviation of 0.0230 g for weights of pennies. Use a 0.01 significance level to test the claim that wheat pennies are manufactured so that their weights have a standard deviation equal to 0.0230 g. Does the Mint specification appear to be met?

Repeat Exercise 16 using the weights of the 37 post-1983 pennies included in Data Set 29 "Coin Weights" in Appendix B.

Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, or critical value(s), then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Assume that a simple random sample is selected from a normally distributed population.

PEPSI DIET WT PEPSI DIET VOL 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 COKE REG WT 0.8192 12.2 12.2 0.7868 0.7846 0.7938 0.7861 0.8211 12.2