著者

松浦利治

出版者

宇部工業高等専門学校

雑誌

宇部工業高等専門学校研究報告 (ISSN:03864359)

巻号頁・発行日

vol.48, pp.61-66, 2002-03

被引用文献数

1

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Let x1,x2,…, xn be n data, and F(x)=(x1-x)^2+(x2-x)^2+…+(xn-x)^2→min, then we get, x=(x1+x2+…+xn)/n=μand F(μ)=n^*σ^2,where ^2 : square, σ : the standard deviation. The Standard Deviation is not the mean distance from the Mean(Arithmetic Mean), one of the averages. If G(x)=|x1-x|+|x2-x|+…+|xn-x|→min, we can get the Median as the value of x, me, another average. What is the. meaning of the minimum value of G(x), G(me)=|x1-me|+|x2-me|+…+|xn-me|? We will propose d, a Median Mean Deviation, and consider the meaning of d.