A tennis coach believes orange juice improves performance.She gives her players orange juice on randomly chosen days,and rates their performance.What,if anything,is wrong with this study?
A) People in a control group should drink orange juice on the same days.
B) The players should be able to choose when to drink orange juice.
C) The study should have a blind observer.
D) Nothing is wrong with this study.
Correct Answer:
Verified
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