An instructor divides the proportion of seniors who have A’s by the proportion o

Question

An instructor divides the proportion of seniors who have A’s by the proportion of freshmen who have A’s. The corresponding relative risk is 3.28. What is (are) the correct interpretation(s) of this value?
Note: 1/3.28= .305

A) Freshmen are .305 times as likely to have an A as seniors.

B) Freshmen are 3.28 times more likely to have an A than seniors.

C) Freshmen are 2.28 times more likely to have an A than seniors.

D) Seniors are .305 times as likely to have an A as freshmen.

E) Seniors are 3.28 times more likely to have an A than freshmen.

F) Seniors are 2.28 times more likely to have an A than freshmen.

Explanation / Answer

relative risk = Probability of even exposed /probability of event when not exposed

= probability of seniors whi have A/ probability of freshman having A

it proves that seniors are 3.28 times more likely to have an A than freshmen

hence choose E)

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