Chapter 12, Problem 4E

(a)

To determine

To find out what kind of sample is this.

Answer to Problem 4E

It is a cluster design.

Explanation of Solution

It is given in the question that major league baseball tests players to see whether they are using performance enhancing drugs. Thus, officials select a team at random and a drug testing crew shows up unannounced to tell all players on team. Thus, the kind of sample used in this kind of study is cluster design because all of the team members from one team is sampled.

(b)

To determine

To explain is that choice appropriate.

Answer to Problem 4E

Yes, it is appropriate.

Explanation of Solution

It is given in the question that major league baseball tests players to see whether they are using performance enhancing drugs. Thus, officials select a team at random and a drug testing crew shows up unannounced to tell all players on team. Thus, this kind of choice is appropriate for this study because the major league baseball would have monetary and personnel problems if done a different way.