Mean kuadrat kasalahan: Béda antarrépisi
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Baris ka-1:
Dina [[statistik]], '''mean kuadrat kasalahan''' tina [[estimator]] ''T'' dina parameter nu teu ka-observasi θ
:<math>\operatorname{MSE}(T)=\operatorname{E}((T-\theta)^2),</math>
dina hal ieu,
:<math>\operatorname{MSE}(T)=\operatorname{var}(T)+(\operatorname{bias}(T))^2</math>
Baris ka-11:
:<math>\operatorname{bias}(T)=\operatorname{E}(T)-\theta,</math>
dina hal ieu, the [[bias (statistics)|bias]]
Conto kongkritna. Anggap
Baris ka-17:
:<math>X_1,\dots,X_n\sim\operatorname{N}(\mu,\sigma^2),</math>
dina hal ieu, ukran sampel random ''n'' tina populasi [[sebaran normal]]. Dua estimators σ<sup>2</sup> kadangkala
:<math>\frac{1}{n}\sum_{i=1}^n\left(X_i-\overline{X}\,\right)^2\ {\rm and}\ \frac{1}
Baris ka-26:
:<math>\overline{X}=(X_1+\cdots+X_n)/n</math>
[[Kategori:Statistika]]
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