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# Which of the following sets has maximum standard deviation? A) {1, 2,

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CEO
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 2726
Location: India
GMAT: INSIGHT
Schools: Darden '21
WE: Education (Education)
Which of the following sets has maximum standard deviation? A) {1, 2,  [#permalink]

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23 May 2017, 05:01
00:00

Difficulty:

15% (low)

Question Stats:

76% (00:57) correct 24% (00:41) wrong based on 37 sessions

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Which of the following sets has maximum standard deviation?

A) {1, 2, 3, 4, 5}
B) {2, 4, 6, 8, 10}
C) {-8, -6, -5, -3, -1}
D) Sets of 5 distinct Prime Numbers
E) {51, 52, 54, 55, 56}

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Re: Which of the following sets has maximum standard deviation? A) {1, 2,  [#permalink]

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23 May 2017, 10:20
1
My approach:
I narrowed the answer choices by distance. It's the faster way to do instead of calculating the standard deviation
A All numbers increase by 1. When you look at the other answer choices, you'll see that others increase more than 1 so A is out
B All numbers increase by 2. When you look at the other answer choices D is a better answer so B is out
C The numbers increase by 1 or 2. B is a better answer than C so C is out
D D is the answer. 2, 3, 5, 7 and 11 could be the numbers. The numbers increase by 1 then by 2 and by 2 and by 4. The distance is more tha answer B
E The numbers increase 1 or 2. E is out.

Re: Which of the following sets has maximum standard deviation? A) {1, 2, &nbs [#permalink] 23 May 2017, 10:20
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