Testing Claims about Variation. In Exercises 516, test the

Chapter 8, Problem 8

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Testing Claims about Variation. In Exercises 516, test the given claim. Identifythe null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s),conclusion about the null hypothesis, and final conclusion that addresses the originalclaim. Assume that a simple random sample is selected from a normally distributedpopulation. Weights of Pennies The preceding exercise involved the claim that post-1983 pennieshave weights with a standard deviation less than 0.0230 g. Data Set 21 in Appendix B includesthe weights of a simple random sample of 35 pre-1983 pennies, and that sample has astandard deviation of 0.03910 g. Use a 0.05 significance level to test the claim that pre-1983pennies have weights with a standard deviation greater than 0.0230 g. Does it appear thatweights of pre-1983 pennies vary more than those of post-1983 pennies?