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《Journal of Shaanxi Vocational & Technical College》 2005-02
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On calculation Problems in arithmetic mean of Right and Wrong Symbol and Standard Difference——Discussing with Professor Li Fangzhong

Li Yueshun Shaanxi Vocational and Technical College(Xi' an 710100,Shaanxi)  
In the book Statistics Principle chiefly compiled by professor Li Fangzhong,the derivation in calculating arithmetic mean of right and wrong symbol and standard difference is not proper.This paper derived again by mathematical methods.
【CateGory Index】: C814
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