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Statistics Basic Concept 統計學基本概念

平均數
Mean

一般情況之下,平均數是指 Arithmetic Mean。

中位數
Median

Mode
眾數


Mathematical Expectation

名稱樣式注釋
Mean

Variance

 

Covariance


Moments

名稱樣式注釋
The moments about the True mean (μ)




The moments about the Assumed mean
( d = x - Assumed Mean )




The moments about the Origin





Skewness

名稱樣式注釋
Moment measure

Positional measure

Karl Pearson's measure

Bowley's measure


Kurtosis

名稱樣式注釋
Moment measure

β2< 0,A Topped Distribution

β2= 0,A Normal Distribution

β2> 0,A Leptokurtic Distribution

Kelly's measure

KK< 0,A Normal Distribution

KK= 0,A Topped Distribution

 

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