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In this paper, two kinds of models are presented and optimized for project investment risk income on the basis of probab......
通过计算 ,验证了标准偏差的标准偏差公式误差很小。在n =3 ,4,5 ,相对误差E =7 9% ,5 0 % ,3 6% ;当n≥ 14 ,E≤ 1%......
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