discussion on last one??

[bilash]

apprentice,
answer to the q at post 6 should be D.

[coolgal]

One More question: This one has been discussed in the forum somewhere as that emerged in Real GRE....

L: 2,4,5,9, 11 M: m+2,m+4,m+5,m+9, m+11
A]Difference between median and standard deviation of L

B] Difference between median and standard deviation of M

I my views it should be D. as we don't have the set value for 'm'. If m=0 then the answer is C. But if m<0 or m>0 then answer would vary. But TMians discussed and conclude that C should the answer.

Please correct me if I am wrong.

The answer is C.
The std devn of a set of numbers remains the same when a constant is added to all the numbers in the set
and here, since a constant value is added, the value of the numbers will increase/decrease to the same amount, so, the median will still remain the 3 rd number
so whatever value m is assigned, the median and SD remain the same.
so, The answer is C

[priyankagre2005]

MWM read the following two versions of the question:

Version I
In a colony, people either reads newspapre A or B. The number of people read Newspaper A is 1/4 more than the number of people who reads Newspaper B.

column A: fraction of peolple who read newspaper A

Col: B: 5/9


Version II
The question should read as below for answer to be C.

In a colony, people either reads newspapre A or B. The "fraction" (not number) of people read Newspaper A is 1/4 more than the number of people who reads Newspaper B.

column A: fraction of peolple who read newspaper A

Col: B: 5/9

Finally, I solved it as the question originally read. Remember in the actual GRE you can be tricked like this.

[apprentice]

The answer is C.
The std devn of a set of numbers remains the same when a constant is added to all the numbers in the set
and here, since a constant value is added, the value of the numbers will increase/decrease to the same amount, so, the median will still remain the 3 rd number
so whatever value m is assigned, the median and SD remain the same.
so, The answer is C

I concur with you for the smae values for SD, but if the value of m changes then the difference would also change, isn't it?

[Bryster]

apprentice... yes, according to the wording of the q.... SD would be the same, but median of L is 5, whereas median of M is m+5..... so the difference would be different (if m not equal to 0), so D should be the answer...


Priyanka... the question should in fact be "the number of people" not "the fraction of people".... think of it this way.. with no unit value or anything 1/4 = 25/100 = 25%,, so saying "1/4 more than the number who read B" is EXACTLY the same as saying "25% more than the number who read B, where we know to interpret that mathematically as x + .25x

[manwiththemission2005]

Priyanka,

The question framed may look really weird but as per logic only, ETS goes .. You cant have the population number in decimals. The question should be read as what Bryster said. So, it should be C as per logic. As far as I m concerned, the question is OK. ETS asks us to jus find out what should be done... whether it is 1/4 + x or 1/4x + x ....

Karthik

Apprentice ,


I go with D. You'r right Cheers.... Glad to see that you'r doin g8 in quants. Make sure you practice the verbal part. All the best.

[apprentice]

Thanks for the appreciation and help in boosting my morale and ofcourse for posting the good questions. Thanks to all the TMians who have cleared their exams and put the questions for us, to practice.

Yeah, I am really worried about my Verbal and i HAVE to get good score there. Thanks for your suggestions, in my thread. I am just doing that, and rying to cram the words...My deadline is closer...............

[coolgal]

I concur with you for the smae values for SD, but if the value of m changes then the difference would also change, isn't it?

ooooopsss.. tht was a great blunder i did..
thanx for correcting!!