Explain why this does not necessarily prove that the, Basic Statistics

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Explain why this does not necessarily prove that the

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Can special study courses actually help raise SAT scores? One organization says that the 30 students they tutored achieved an average gain of 60 points when they retook the test.

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

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

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

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Basic Statistics: Explain why this does not necessarily prove that the

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