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.
Question 12.42
breakfastcereals2
42. What Result Might We Expect? The comparison boxplot of the nutritional ratings is shown here. Assume that the normality condition is satisfied.
- Explain whether the plot may be considered evidence for or against the null hypothesis that all population mean nutritional ratings were equal.
- Would we expect the null hypothesis to be rejected or not to be rejected?