Consider again the one-way ANOVA hypothesis test described in Problem 7. Address the multiple comparison problem by applying the Bonferroni, Tukey, and Scheffé methods to obtain an overall confidence level of approximately 95%. Summarize your results. Recall that the relevant data are given in the file P12_7.XLS.

Data from in problem 7

Boxes of Cheerios cereal are filled by five identical machines at a local General Mills plant. Independent samples are randomly drawn from a large number of Cheerios boxes filled by each machine, and the number of ounces of cereal in each selected box is recorded in the file P12_7.XLS. Use one-way ANOVA to help decide whether the five machines are yielding essentially equivalent average fills (in ounces). Briefly summarize your findings.