Chapter 13, Problem 24E

a)

To determine

To explain the importance of randomization.

Answer to Problem 24E

Randomization is important to equalize two groups.

Explanation of Solution

There might be bias in the results or in the subjects. Therefore, to reduce this bias and equalize two groups with respect to unknown factor we need randomization.

b)

To determine

To explain the advantages and disadvantages of using 100 subjects.

Explanation of Solution

The advantage of the using 100 subjects is to minimize the impact of individual variability in the responses. The disadvantage is the experiment would become more costly and time consuming.