If the average value of data x1 , x2 , ..., x(/n) is x = ( x1 + x2 + ... + x(/n))/n, then the difference between each data x(/i) and the average value, x(/i) - x, is called the deviation of x(/i). From this, we can derive the mean deviation (average of the absolute values of the deviations), standard deviation, variance, etc. Source : Heibonsha Encyclopedia About MyPedia Information |
資料x1,x2,…,x(/n)の平均値をx=(x1+x2+…+x(/n))/nとするとき,各資料x(/i)と平均値の差x(/i)−xをx(/i)の偏差という。これから平均偏差(偏差の絶対値の平均),標準偏差,分散などが導かれる。
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