Tema 2.1. Propiedades de los estimadores Flashcards

1
Q
  1. Sesgo (Ô) =
A

E(Ô) - O

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2
Q
  1. ECM (Ô) =
A

V(Ô) + Sesgo(Ô)^2
E(Ô - O)^2

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3
Q
  1. Eficiencia relativa
A

O1 es mas eficiente que O2 si su ECM es menor

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4
Q
  1. Eficiencia absoluta
A

el estimador más eficiente de todos es insesgado y con la varianza mínima posible (Cota de Cramer-Rao)

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5
Q
  1. Asintóticamente insesgado
A

si lim n->inf sesgo(Ô)=0

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6
Q
  1. Consistente
A

si lim n->inf ECM(Ô)=0

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7
Q

Si Ô es insesgado…

A

ECM(Ô)=V(Ô)

y es asintóticamente insesgado

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8
Q

ECM(Ô)>V(Ô)>0

A

Real

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9
Q

V(Ô) =

A

E(Ô-E(Ô))^2
E(Ô^2) - E(Ô)^2

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10
Q

X barra, S^2, S y p^ …

A

cumplen todas las propiedades para mu, sigma^2, sigma y p (respectivamente)

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11
Q
A
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