(Solution Download) If we refer to the weights in grams of quarters

If we refer to the weights (in grams) of quarters listed in Data Set 13 in Appendix B, we will find 50 weights with a mean of 5.622 g and a standard deviation of 0.068 g. Based on this random sample of quarters in circulation, construct a 98% confidence interval estimate of the population mean of all quarters in circulation. Is the claim that quarters are minted to yield a mean weight of 5.670 g consistent with the confidence interval? If not, what is a possible explanation for the discrepancy?