A track and field coach wants to analyze the effect of sports drinks on the perf

Question

A track and field coach wants to analyze the effect of sports drinks on the performance of his athletes. He decides to test two brands (Powerade and Gatorade) as well as a placebo drink (that tastes similar, and comes in a similar bottle, but without the sugar or mineral contents) on 18 of his athletes, both male and female. His response variable will be the time the athletes take to complete a 5km run.Which of the following is the best way to implement the Randomization in this experiment?

A. Since gender is an important lurking variable, the coach should use a mechanical method to assign each drink to 3 male and 3 female athletes.

B. The coach should place all the drinks on a table, and allow each athlete to pick their favorite at random.

C. To avoid biasing the results, athletes should not know which drink they are getting.

D.The coach should rank the 18 athletes according to their abilities, and then give Gatorade to the best 6 athletes, Powerade to the next 6, and the placebo to the last 6.

Explanation / Answer

The correct answer should be

A. Since gender is an important lurking variable, the coach should use a mechanical method to assign each drink to 3 male and 3 female athletes.

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