Boil it down:
Average grades for Online = Offline
Withdrawal rate Offline < Online
Withdraw = Failure
Inference: Online had More withdrawal. BUT similar average grades. Online guys are more intelligent.
If the statements above are true, which of the following
must also be true of Cheever College?
(A) Among students who did not withdraw, students enrolled in online courses got higher grades, on average, than students enrolled in classroom-based courses – Correct answer – Magic of averages
(B) The
number of students enrolled per course at the start of the school term is much higher, on average, for the online courses than for the classroom-based courses – Irrelevant comparison
(C) There are
no students who take both an online and a classroom-based course in the same school term – Irrelevant
(D) Among Cheever College students with the
best grades, a significant majority take online, rather than classroom-based, courses – trap – Although it is a possibility, this is not the only possibility. Another possibility is less students in online courses BUT higher grades.
(E) Courses offered online tend to deal with
subject matter that is less challenging than that of classroom-based courses. – Irrelevant