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Statistics 統計學
Central Tendency
Variation
Shape



Mathematical Expectation 
Moments 
Skewness 
Kurtosis 
 
 
 
 



Economics

樹仁 經濟學友仔

解說



 
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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