Question

A pharmaceutical company studies the effects of two drugs, Drug A and Drug B, on blood pressure. Suppose the company has 30 people for this study. After a trial period of 6 months, each person’s blood pressure will be measured. The average blood pressure between the drugs will be compared.There are multiple ways to conduct the study. Below are four possibilities. Label each as either completely randomized, block, or matched pairs.

a.Researchers at the company randomly split the 30 individuals into the two groups. One group will be given Drug A, and the other group will be given Drug B

.b.Researchers split the 30 individuals into groups of 2 people based on their age. Within each group, one person will be randomly assigned to receive one of the drugs

.c.Researchers split the 30 individuals into 2 groups based on age: younger than 50, 50 or older. Within each group, half will be randomly assigned to Drug A, and the other half will assign to Drug B.

d.Researcher split the 30 individuals into 5 groups based on age: 20s, 30s, 40s, 50s, 60s. Within each group, half will be randomly assigned to Drug A.

Answer 1