Question

The long-term average score on the first organic chemistry exam of the year is 42 out of 60 points. The professor wonders whether 12 students he has selected to participate in a pre-exam meditation session score better than the long-term average.

The mean score of this group on the first exam is 49 points. He uses a t-test to understand whether this sample provides evidence that the meditation aids exam performance. His test produces a value of t of 2.12. In a single succinct sentence, offer the full correct interpretation of this result (hint: your answer should include the words "mean" and "population" at least once), including the statistical justification for the conclusion (i.e., state the critical value). Assume alpha = 0.05. It is insufficient to simply state "He should reject the null hypothesis."

Answer 1

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