Sugar in Cereal Refer to Data Set 16 in Appendix B and combine the sugar amounts for shelves 3 and 4, which are the two highest shelves. Use a 0.05 significance level to test the null hypothesis that the mean sugar amounts on the different shelves are all the same. What do the results suggest about the common belief that supermarkets place high-sugar cereals on shelves that are at eye-level for children?