Do SAT coaching classes work? Do they help students to improve their test scores

Question

Do SAT coaching classes work? Do they help students to improve their test scores? Four students were selected randomly from all of the students who completed an SAT coaching class. For each student, we recorded their first SAT score (before the coaching class) and their second SAT score (after the coaching class). The results are given below:

To analyze these data, we should use

A. the one-sample t test. B. the matched pairs t test. C. the two-sample t test. D. Any of the options. It just needs to be a t since ? is unknown.

Explanation / Answer

As the two scores are matched for each student (before and after), then it is a

B. MATCHED PAIRS T TEST.

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