Which set of data exhibits a highest standard deviation? a) 7,0,-7,7,0,-7 b) 7,-7,7,-7,7,-7

Please explain clearly

This question is related to TCS Interview

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Jun 16th, 2007
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saleem ahamed syed
Profile Answers by saleem ahamed syed

Sep 24th, 2007

Ans:b 7,-7,7,-7,7,-7 its SD is 7
Here i can t give u formulae:
Bcoz of special characters like SQRT etc.
please have below URL :http://en.wikipedia.org/wiki/Standard_deviation
where u can find the procedure to find SD.

Thanks,
Saleem.

sanjeev yadav
Profile Answers by sanjeev yadav

Jan 9th, 2008

more -sign , more sd
also
sd= underroot of( (m-x1) * (m-x2) *.........* (m-xn)) ) / n

m = (x1+x2+...xn ) / n