Ca final

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in sfm formula for st d.dev. in class divide by n-1 whereas in practice manual divide by n .confused which is correct . pls hlp.
Replies (3)

The correct method is to divide by n-1. If you refer the latest practice manual, they have corrected most of the solutions by putting n-1.

Ankit which edition practise manual u talking abt?

They have corrected it in Jan 2014 edition and onwards.
 


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