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

Answer:

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.

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