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An alcohol awareness task force at a Big Twelve university

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An alcohol awareness task force at a Big Twelve university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following result was obtained:

(See attached file for full problem description).

Referring to the table above, the events "Did well on Midterm" and "Did Poorly on Midterm" are:

a. statistically dependent
b. mutually exclusive
c. collectively exhaustive
d. all of the above.

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