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Which of the companies x and y has greater salary deviation?

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getzgetzu
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Which of the companies x and y has greater salary deviation? [#permalink] New post   06 May 2006, 04:55
Which of the companies x and y has greater salary deviation?

1) The average salary of x is greater than that of y
2) The median of x is greater than that of y



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Re: Which of the companies x and y has greater salary deviation? [#permalink] New post   06 May 2006, 09:49
According to me E
1) The average does not tell about whether the SD is more or less. It can be either way
2) The median also does not indicate anything about the SD
Taking the statements together, still we cannot tell anything about the SD. Hence E
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Re: Which of the companies x and y has greater salary deviation? [#permalink] New post   06 May 2006, 21:13
Looks E to me.
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Re: Which of the companies x and y has greater salary deviation? [#permalink] New post   06 May 2006, 21:33
krishnosarkar wrote:
According to me E

1) The average does not tell about whether the SD is more or less. It can be either way
2) The median also does not indicate anything about the SD
Taking the statements together, still we cannot tell anything about the SD. Hence E


agree with E.

but the question is not about SD. its about deviation and SD and deviation are different but related concepts.
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Re: Which of the companies x and y has greater salary deviation? [#permalink] New post   06 May 2006, 22:54
Agree with E..

1 tells us the Mean.. does say how varied or spread out the values are
2 tell us the Median... So what

Combining? We do not get anything new.
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Re: Which of the companies x and y has greater salary deviation? [#permalink] New post   06 May 2006, 23:59
Well, I agree with answer E, to understand this you may need to plug in numbers... (Don't worry about negative salary, its easier to prove concept with this

A => {-10, -1, 0, 1, 10} mean median {0,0}
B => {-11, -2, -1, 2, 11} =>{-1, -1/3} if you notice B has higher SD than A

But if we take
B => {-3, -2, -1, 2, 3} =>{-1, -1/3} , B has lower SD than A

so both togather insufficient!



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Re: Which of the companies x and y has greater salary deviation? [#permalink]
06 May 2006, 23:59
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