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Формула Стерджеса має вигляд
хсер= х1+ х2+…+ хn/n
хсер=х1*f1+ х2*f2+…+ хn*fn/ f1+ f2+…+ fn
хсер=n/(1/ х1+1/ х2+…+1/ хn)
n=1+3,321lgN
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