Last year, 75% of the students who took the GRE prep course with SuccessTutor go

Question

Last year, 75% of the students who took the GRE prep course with SuccessTutor got into their first choice grad school.

Which of the following conclusions are true? (select all that apply)

a.The people who chose to take SuccessTutor were different from the people who didn’t choose SuccessTutor. They might have done better anyway.

b.Perhaps SuccessTutor advises applicants on what schools they are most likely to get into and students then change their opinion of ‘first-choice’ schools to match where they are likely to be successful.

c.If you take the GRE prep course with SuccessTutor you will have a 75% chance of getting into your first choice grad school.

d.Only 25% of the applicants who did not choose SuccessTutor got into their first choice grad school.

Explanation / Answer

The answer is (c)

If you take the gre prep course with successt you will have 75% chance of getting into your first choice grad school.

Note: using last year results as parameter we come to the conclusion that if someone goes to successt the probability of success is 0.75

We cannot conclude (a) as we don’t know other prep school results

We cannot conclude (b) as we don’t have enough information

(d) is not true

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