Question: An educational psychologist was teaching a graduate seminar with seven students. He was curious to know if the amount of sleep had an impact on

An educational psychologist was teaching a graduate seminar with seven students. He was curious to know if the amount of sleep had an impact on performance. On the first exam, he asked how many hours the students had slept the night before. Here are the data he obtained:

8, 9, 7, 6, 8, 4, and 7.

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