Data 9.2 on page 540 introduces the dataset Cereal, which includes information on the number of grams of fiber in a serving for 30 different breakfast cereals. The cereals come from three different companies: General Mills, Kellogg’s, and Quaker. Use the fact that SSGroups is 4.96 and SSTotal is 102.47 to conduct an analysis of variance test to determine whether there is a difference in mean number of grams of fiber per serving between the three companies. The conditions for ANOVA are reasonably met.

Data 9.2 on page 540

Labels on many food products contain a wealth of nutritional information. The data in Cereal include the number of calories as well as the grams of fat, carbohydrates, fiber, sugars, and protein and milligrams of sodium in each cup of a sample of 30 breakfast cereals from three different manufacturers (General Mills, Kellogg’s, and Quaker).