Question: LSAT prep Can test prep courses actually help raise LSAT scores? One organization says that the 30 students they tutored achieved an average gain of

LSAT prep Can test prep courses actually help raise LSAT scores? One organization says that the 30 students they tutored achieved an average gain of 15 points when they retook the test.

a) Explain why this does not necessarily prove that the test prep course caused the scores to go up.

b) Propose a design for an experiment that could test the effectiveness of the test prep course.

c) Suppose you suspect that the test prep course might be more helpful for students whose initial scores were particularly low. How would this affect your proposed design?

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