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A paired t test was used to analyze the results of an experiment where each of 5 students took a test in two environments: one noisy and one quiet. Which of the following distributions must be approximately
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A paired t test was used to analyze the results of an experiment where each of 5 students took a test in two environments: one noisy and one quiet. Which of the following distributions must be approximately Normal for the conditions to be satisfied?

I. The distribution of test scores in a noisy environment
II. The distribution of test scores in a quiet environment
III. The distribution of differences in test scores
(a) I only
(b) II only
(c) III only

User Shakeel
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I think the answer is c but I’m might be wrong
User Pawan
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