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Mathematics Professor at Hartworth College

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Mathematics Professor at Hartworth College [#permalink]

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New post 02 Jan 2018, 21:59
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Mathematics Professor at Hartworth College: The performance of the current batch of Hartworth College students in the Mathematics course has been the best till date. Our current batch of students studying Mathematics has broken the record for the last highest average grade received by any batch in the course. This year, the average grade of the students enrolled in the Mathematics course saw a 7 percent increase over the previous highest average grade for the course that was recorded in the year 2009.

Which of the following most weakens the Professor’s statement?

A)The grading system at Hartworth for a particular course differs from the grading system followed by other colleges.

B)The performance of the current batch in Economics, a subject that utilizes Mathematical knowledge for a few concepts, has been the worst in the history of Hartworth.

C)The grading methodology followed for any course evaluation has never been changed since the college was first founded in 1975.

D)Each course in Hartworth follows a grading system in which the grades reflect scores that are computed as a percentage of the course topper’s absolute marks.

E)In the current batch, the number of students who scored above 90 percent in the course is less than the number of students who scored above 90 percent in 2009.


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[Reveal] Spoiler: OA

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Re: Mathematics Professor at Hartworth College [#permalink]

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New post 03 Jan 2018, 08:07
Prashant10692 wrote:
Mathematics Professor at Hartworth College: The performance of the current batch of Hartworth College students in the Mathematics course has been the best till date. Our current batch of students studying Mathematics has broken the record for the last highest average grade received by any batch in the course. This year, the average grade of the students enrolled in the Mathematics course saw a 7 percent increase over the previous highest average grade for the course that was recorded in the year 2009.

Which of the following most weakens the Professor’s statement?

A)The grading system at Hartworth for a particular course differs from the grading system followed by other colleges.

B)The performance of the current batch in Economics, a subject that utilizes Mathematical knowledge for a few concepts, has been the worst in the history of Hartworth.

C)The grading methodology followed for any course evaluation has never been changed since the college was first founded in 1975.

D)Each course in Hartworth follows a grading system in which the grades reflect scores that are computed as a percentage of the course topper’s absolute marks.

E)In the current batch, the number of students who scored above 90 percent in the course is less than the number of students who scored above 90 percent in 2009.


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IMO - D

A - Out of scope. No mention of other colleges.
B - No mention of overlap between Economics and Mathematics class so irrelevant here.
C - This one strengthens the argument so opposite of what we need.
D - Correct answer. If given sentence is true, grading of any two batches is not comparable. Weakening original argument.
E - 90 percent - absurd/arbit number here so the statement is irrelevant.
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Mathematics Professor at Hartworth College [#permalink]

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New post 06 Jan 2018, 05:11
Classic relative grading scenario.
Assume 2009 batch, in which the topper (call him Jack) achieved 90/100. As per the option D, Jack got 100 (since he is the topper) and now everyone in the class will be graded with respect to Jack. Beware the denominator will no longer be 100 to calculate the grade of the class students.

For example , there is a guy named Jill in the class of 2009 from the same batch. He received 80 marks. But as per option D his grade is not calculated as 80/100 but calculated as 80/90. Since Jack is the topper, his marks will be the BENCHMARK from now on.

What if this batch highest is a mere 70/100. and all the marks will be calculated accordingly i.e. something/70. so we cannot ideally compare any two batches in the college. Hence D is the answer!

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Re: Mathematics Professor at Hartworth College [#permalink]

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New post 06 Jan 2018, 12:54
Mathematics Professor at Hartworth College: The performance of the current batch of Hartworth College students in the Mathematics course has been the best till date. Our current batch of students studying Mathematics has broken the record for the last highest average grade received by any batch in the course. This year, the average grade of the students enrolled in the Mathematics course saw a 7 percent increase over the previous highest average grade for the course that was recorded in the year 2009.

Which of the following most weakens the Professor’s statement?

A)The grading system at Hartworth for a particular course differs from the grading system followed by other colleges. -Other colleges are out of scope

B)The performance of the current batch in Economics, a subject that utilizes Mathematical knowledge for a few concepts, has been the worst in the history of Hartworth. -Maybe maths was good but other parts of Economics were bad. No impact on the argument.

C)The grading methodology followed for any course evaluation has never been changed since the college was first founded in 1975. -Strengthens the argument.

D)Each course in Hartworth follows a grading system in which the grades reflect scores that are computed as a percentage of the course topper’s absolute marks. -This essentially talks about the percentile system. So if in the latest batch topper got 40/100 and the second best got 39/100. The grades will be A and A (assumption: A=Excellent, B=Very good, C=Good). Thus the average grade will be A. However, if in 2009 topper got 90/100 and second best got 70/100 and the respective grades were A and C, then the average grade would have been B. Thus even with better marks 2009 batch would have been marked as worse than the current batch.

E)In the current batch, the number of students who scored above 90 percent in the course is less than the number of students who scored above 90 percent in 2009. -We are worried about the average marks
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Re: Mathematics Professor at Hartworth College [#permalink]

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New post 07 Jan 2018, 15:29
Not a fan of the question - "course topper". Is this British English? I have never heard this term before and I've lived in the US for 20+ years.

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Re: Mathematics Professor at Hartworth College [#permalink]

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New post 07 Jan 2018, 18:08
hjli89 wrote:
Not a fan of the question - "course topper". Is this British English? I have never heard this term before and I've lived in the US for 20+ years.

100% agree with this. Never heard of the phrase course topper

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Re: Mathematics Professor at Hartworth College   [#permalink] 07 Jan 2018, 18:08
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Mathematics Professor at Hartworth College

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