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pretttyune
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Q. There are first 9 consecutive integers, r is range, m is 13 Nov 2007, 06:53
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Q. There are first 9 consecutive integers, r is range, m is mean, and d is the standard deviation, which one is right?

I. d r


I thought only I, and II were right, but III was also right in OA.
Why is it so? please HELP..



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Q. There are first 9 consecutive integers, r is range, m is 13 Nov 2007, 08:03
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What is option III ?
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pretttyune
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Q. There are first 9 consecutive integers, r is range, m is 13 Nov 2007, 09:09
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jbs
What is option III ?
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OOOOOps, sorry for that.

I. d<r
II. m<r>r
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Q. There are first 9 consecutive integers, r is range, m is 13 Nov 2007, 09:13
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pretttyune
jbs
What is option III ?

OOOOOps, sorry for that.

I. d<r
II. m<r>r
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what???? Is there something I am missing here?

III) 8d>r

And option II is m<r ...i hope those are the options..

Where did u get this problem from? I had come across a book which said that to find s.d , one is supposed to divide by n-1 and not n. I do not remember the name of the book now. Anyways, if that is indeed the case( which i do not think it is), then III will be right. Otherwise, I do not see how.
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Q. There are first 9 consecutive integers, r is range, m is 13 Nov 2007, 09:33
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pretttyune
jbs
What is option III ?

OOOOOps, sorry for that.

I. d<r
II. m<r>r
Show more


what???? Is there something I am missing here?

III) 8d>r

is right. THe text doesn't just read my input.

Thanks for the reply, but i can't still exactly understand why III) option is also right.. can you please help me understand it more??? sorry..
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Q. There are first 9 consecutive integers, r is range, m is 13 Nov 2007, 09:48
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PR says that s.d is calculated by dividing by (n-1) and not 'n'. ( Till today, I thought it was a typo )

That might be the possible explanation why III is being given right. I do not know of any other possible reason.



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