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Cheever College offers several online courses via remote

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Cheever College offers several online courses via remote  [#permalink]

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New post 12 May 2011, 01:37
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A
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Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses.

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.
(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.
(C) There are no students who take both an online and a classroom-based course in the same school term.
(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses.
(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses.

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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 12 May 2011, 03:44
GMATD11 wrote:
31) Cheever college offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall the average student grade for online courses matched that for classroom- based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawals was much lower for students enrolled in online courses.

If the statement above are true, which of the following must also be true of Cheever college?

Use fact test for must be true/conclusion deriving/inference kind of questions. The option should be traced back to a reference in the argument.

a) Among students who did not withdraw, students enrolled in online courses got higher grades, on average, than students enrolled in classroom based courses. -- discussed below.

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 -- Not discussed

c) There are no students who take both an online and a classroom-based courses in the same school term -- An assumption answer choice it is rather.

d) Among Cheever College students with best grades, a significant majority take online, rather than classroom-based, courses -- Discussed below.

e) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses. -- not discussed.

I marked A but wrong


people enrolled in online and traditional = Pon | Ptra Pon > Ptra
scores of online and traditional students = Son | Stra

Son/Pon = Stra/Ptra => Son > Stra meaning scores of online enrolled students should be more than traditional students.

hence D fits in perfectly meaning higher scores of online students.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 26 Jul 2011, 08:43
singalong wrote:
This is from OG12. OA is A.


OG question is not exactly same. OG question says "the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses." Here it is exactly opposite.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 02 Dec 2011, 00:05
Why D is not a correct answer? I think avg is the same, and the withdraw rate of students in online >> (much higher) withdraw rate of students in classroom --> more students fail in online classes, but they are still counted when calculating avg --> to lift up the avg of online students, there must be some students who score much higher than classroom students do, hence D.

OA is A, but I can't justify why D is not correct.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 21 Mar 2012, 16:34
this is confusing and its only a 600 level question. I think its higher.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 21 Mar 2012, 23:03
selected D cant understand why its A, rejected A thinking it to be opposite answer.

any helpful explanation will be appreciated

thnx
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 30 Aug 2012, 00:27
The argument says that "average student grade for online course matched that for classroom-based courses" and "course withdrawals were weighted as equivalent to a course failure"
A) says that "Among students who did not withdraw, students enrolled in online courses got higher grades". This corresponds with the argument since withdrawals were considered as course failure; therefore the remaining students' average grades must be higher"

we cannot infer anything such in D) mentions and the word is somewhat too extreme "best grade"
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 07 May 2014, 23:51
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Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses.

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.
(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.
(C) There are no students who take both an online and a classroom-based course in the same school term.
(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses.
(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses.



the average student grade for online courses = the average student grade for classroom-based courses
withdrawal= failure
withdrawal for online courses > withdrawal for classroom-based courses

so it can be deduced A : to have the same average with students in classroom-based courses, students in online courses should get higher grades on average to compensate the higher withdrawal.

D is not correct bcz in the argument we don't care about the best grades, higher grades is enough to justify the equation. consider the following scenario:

in classroom based courses:
total #enrolled: 30
#withdrawal: 1 (consider withdrawal score 0)
#best score 100/100: 3
if we consider passing score 50, and if we consider the worst case: # of who just passed : 26
ave= 3*100+ 26*50= 1600/30=53.3

in online courses:
total #enrolled: 30
#withdrawal: 5
#best score 100/100: 1
and consider the best case for this group: the remaining got 99/100

ave= (100+ 24*99)/30=82.53

so, in this case the average must be higher in classroom-based courses.
and we can see what is matter here is the average higher grades not the best grades.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 08 May 2014, 00:42
In order to reach the average grades of class room based courses, the only option is if the students who didn't withdraw achieved the higher grades than classroom based courses.

Thank you very much for sharing this qn
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 07 Aug 2015, 08:30
I've used POE to tackle this question.

(a) Hold on.
(b) Cannot predict about numbers since stimulus talks about percentages. Eliminate.
(c) "No students" - extreme language. Eliminate.
(d) "Best grades" - passage talks about average grades. Eliminate.
(e) "Subject matter that is less challenging" - difficulty is discussed nowhere. Eliminate.

Finally selected answer choice (a).

My questions are below:
1) Is this the right approach?
2) If No., how to get correct answer to these questions on test day under 2 min?
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 07 May 2017, 22:06
Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses.

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.
(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.
(C) There are no students who take both an online and a classroom-based course in the same school term.
(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses.
(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses.


My 2 cents.

Premise.
1. Avg of online and off-line is the same.
2. Course withdrawal = failure
3. rate of withdrawal for off-line < rate of withdrawal for online

For the average of off-line and online to be equal, considering the rate of withdrawal for online is higher,
then Either rate of failure for offline > rate of withdrawal for online
OR
the grades for online > off-line.

Thus, A.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 08 Jan 2018, 12:32
Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses.

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
(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. -We can't say anything about the number of students
(C) There are no students who take both an online and a classroom-based course in the same school term. -Can't say
(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses. -Can't say anything about the "best" students. We just know about the "average".
(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses. -Challenging? out of scope
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 21 Feb 2018, 12:59
GMATD11 wrote:
Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses.

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.
(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.
(C) There are no students who take both an online and a classroom-based course in the same school term.
(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses.
(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses.

Official Guide 12 Question

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Question: 31
Page: 38
Difficulty: 600

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OA makes sense after picking up wrong choice first.

Difference between choices A & D is that choice A correctly compares average grades of students between the two groups while choice D wrongly compares percentage of students with best grades that could be any arbitrary value.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 22 Feb 2018, 11:29
Must be true questions are about "what have you read and what do you know on the basis of that reading." Going by this logic of staying within the scope of the argument, let us look at the answer choices:

(A) Among students who did not withdraw, students enrolled in online courses got higher grades, on average, than students enrolled in classroom-based courses. Okay, so the course failures were higher in online but average grades of students in online course=average grades of students in classroom course. Hence, if course failures were more but even then average grades were equal then the online students must be scoring high. Hold.

(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. We are comparing averages and withdrawals with in the sets and not between the two sets. Incorrect.

(C) There are no students who take both an online and a classroom-based course in the same school term. Can not be inferred from the argument. Incorrect.

(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses. New information, out of scope. Incorrect.

(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses. New information and out of scope. Incorrect.

Hence, A.
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 05 Mar 2018, 08:53
GMATD11 wrote:
Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses.

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.
(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.
(C) There are no students who take both an online and a classroom-based course in the same school term.
(D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses.
(E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses.

Official Guide 12 Question

GMAT Official Guide 12

Question: 31
Page: 38
Difficulty: 600

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Video Explanations:



Sorry for the dumb question, maybe I am missing something, but this is a MUST be TRUE question:
By POE: I narrowed down to A.
but still I don't understand the option,
Online - Two enrolled; One withdrew (failed)
Class- Three enrolled, Zero failed
So, one condition of the question is satisfied.

As per (A), Online- 1 student got 50 marks (Avg= 50/1=50)
Classroom- 3 students got 50 each (Avg= 150/3=50)
the average student grade for online courses matched that for classroom-based courses.--This condition is also satisfied.
So how does A satisfy the conditions?
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Re: Cheever College offers several online courses via remote  [#permalink]

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New post 24 Mar 2018, 11:30
ShashwatPrakash wrote:

Sorry for the dumb question, maybe I am missing something, but this is a MUST be TRUE question:
By POE: I narrowed down to A.
but still I don't understand the option,
Online - Two enrolled; One withdrew (failed)
Class- Three enrolled, Zero failed
So, one condition of the question is satisfied.

As per (A), Online- 1 student got 50 marks (Avg= 50/1=50)
Classroom- 3 students got 50 each (Avg= 150/3=50)
the average student grade for online courses matched that for classroom-based courses.--This condition is also satisfied.
So how does A satisfy the conditions?


Hi ShashwatPrakash,

Think from the point of view of withdrawals. Withdrawals are equivalent to failing. And failing will bring down the average marks...

So if the average marks are the same ... And online course has more withdrawals.. the loss of average marks in classroom course must be due to "failing" which would compensate for its lesser withdrawal rates.

Hence option A fits the bill.

Hope it is clear.

Best,
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Re: Cheever College offers several online courses via remote &nbs [#permalink] 24 Mar 2018, 11:30
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