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.