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, 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 Replication in this experiment? *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. *Since there are 18 athletes, he should give each drink to 6 of them. *Because gender is an important lurking variable, the coach should make sure that the 18 athletes include 9 males and 9 females. *All of the answer choices.
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