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The chart above represents the number of students at five schools, eac

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The chart above represents the number of students at five schools, eac [#permalink]

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New post 12 Jan 2017, 00:10
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

66% (00:44) correct 34% (01:01) wrong based on 102 sessions

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The chart above represents the number of students at five schools, each of which has branches in each of four towns. In which town is the standard deviation of the number of students at each school the least?

A. Town A
B. Town B
C. Town C
D. Town D
E. Cannot be determined.

Attachment:
2017-01-12_1108.png
2017-01-12_1108.png [ 17.61 KiB | Viewed 1289 times ]

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Re: The chart above represents the number of students at five schools, eac [#permalink]

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New post 12 Mar 2017, 20:33
Bunuel wrote:
Bunuel wrote:
Image
The chart above represents the number of students at five schools, each of which has branches in each of four towns. In which town is the standard deviation of the number of students at each school the least?

A. Town A
B. Town B
C. Town C
D. Town D
E. Cannot be determined.

Attachment:
2017-01-12_1108.png


BUMP................................



Town having least deviation from its mean position has the least SD

Town A= 217-95 = 122
Town B=156-99 =57
Town C= 204-148 =56
Town D=220-35 = 185

Since town C has less deviation it has least SD

Ans C
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Re: The chart above represents the number of students at five schools, eac [#permalink]

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New post 12 Mar 2017, 21:56
Standard Deviation is the dispersion of elements from the mean position .
In Town C dispersion is the lowest i.e Maximum element- minimum element =204-148 =56
Hence Answer is C
Re: The chart above represents the number of students at five schools, eac   [#permalink] 12 Mar 2017, 21:56
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