Chapter 4.2, Problem 86E

To determine

To choose the correct option from the multiple choice question for the question.

Answer to Problem 86E

The option (d) is the correct option.

Explanation of Solution

To find out how many different combinations the gardener wants to test which will be the treatments, multiply the number of options in the first set of choices (none, one cup, two cups) times the number of options in the second set of choices (none, wood chips, pine needles, plastics). In this case, the numbers are three and four, whose product is $12$ , meaning there are $12$ combinations of fertilizer and much to be used as treatments. There are $60$ green beans, which is the experiment are our experimental units. Divide $60$ by $12$ to get five number of experimental units receiving each treatments. Thus, the option (d) is correct option.