Barbara is a research biologist for Green Carpet Lawns. She is studying the effects of fertilizer type, temperature at time of application, and water treatment after application. She has five fertilizer types, four temperature zones, and three water treatments to test. Determine the number of different lawn plots she needs in order to test each fertilizer type, temperature range, and water treatment configuration.

Question

Quizplus · Accepted Answer

In order to test all possible combinations of fertilizer type, temperature range, and water treatment, Barbara needs to have 5 x 4 x 3 = 60 different lawn plots. Therefore, the correct answer is E.

Barbara Is a Research Biologist for Green Carpet Lawns