Nutritional Rating of Breakfast Cereals. Use this information for Exercises 42–45. Does the nutritional rating of breakfast cereals vary by manufacturer? The data set Breakfast Cereals 2 contains information on the nutritional rating and manufacturer for 68 breakfast cereals.⁴ Assume that the cereals were selected randomly from the manufacturers so that the selection of a cereal from one manufacturer did not affect the selection of cereals from other manufacturers.