Refer to Data Set 19 in Appendix B for the amounts (in oz) in cans of regular Coke. The cans are labeled to indicate that the contents are 12 oz of Coke. Use a 0.05 significance level to test the claim that cans of Coke is filled so that the median amount is 12 oz. If the median is not 12 oz, are consumers being cheated? Use the Wilcoxon signed-ranks test for the claim about the median of a population.