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Ca final
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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