KEAM 2014 Math Paper

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Question : 16 of 120

Marks: +1, -0

If

9

Σ

i=1

(xi−5)=9 and

9

Σ

i=1

(xi−5)2=45, then the standard deviation of the 9 items x1,x2,..,x9 is

9
4
3
2
1

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