Which of the following is an example of a two-way ANOVA test? a.) Comparing the number of hours of sleep between children
and adults.
b.) Comparing the number of hours of sleep for children,
teenagers, adults, and senior citizens.
c.) Studying the monthly income of residents who live in rural,
urban, and suburban areas.
d.) Studying the number of hours of sleep as well as primary
residence (rural, urban, or suburban) for children, teenagers,
adults, and senior citizens.