AP and TS EAMCET Engineering Model Paper 13

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Question : 65 of 160

Marks: +1, -0

If

18

∑

i=1

(xi−8)=9 and

18

∑

i=1

(xi−8)2=45 and then the standard deviation of x1,x2,....x18 is:

4
9
9
4
3
2
None

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