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確率変数のモーメントの計算
説明
確率変数のモーメントと確率変数を含む代数式を計算します。
Maple's initial probability distributions または creating custom distributions を使用して確率変数を定義します。
分布のパラメータには記号、数値またはその混合が可能です。
__X__ := Statistics[ RandomVariable ]( Exponential(__b__) ): __Y__ := 2*__X__ + 1;
確率変数の平均と分散を計算します。
__Xmean__ := Statistics[ Mean ]( __X__ ); __Yvar__ := Statistics[ Variance ]( __Y__ );
確率変数のモーメントを計算します。
__X1st__ := Statistics[ Moment ]( __X__, 1 ); __X3rd__ := Statistics[ Moment ]( __X__, 3 );
真ん中が非ゼロの場合についてモーメントを計算します。
__Xvar2__ := Statistics[ Moment ]( __X__, 2, origin = __Xmean__ );
使用したコマンド
Statistics[RandomVariable], Statistics[Distributions][Exponential] ,Statistics[Moment]
参照
Statistics, Statistics[Distributions], Statistics[DescriptiveStatistics]
Download Help Document