A football coach gives half his players a protein bar to eat before each game; the other players do not receive the protein bar. After a month of games, he analyzes their playing stats. He concludes the protein bar helped improve their performance on the field. How can the coach test the means to be sure the results are not likely to happen by chance?

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A. He can rerandomize the results by separating the two groups randomly, then calculate the means and the difference of the means.
B. He can pick players at random and analyze their playing stats without calculating means.
C. He can analyze the two groups by calculating the means and the difference of the means.
D. He can pick the players he wants to analyze based on the best stats.

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I think its a

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To test whether a difference between treatment and control groups exists, the data can be re-randomized many times to test the probability that the difference of means that was found in the study is likely to happen by chance.

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that from my school

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