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Prueba Z de 2 proporciones
Comando: TwoPropZTest
Descripción: Este comando compara la proporción de éxitos de dos poblaciones. Para una
distribución normal se utiliza una prueba Z de 2 proporciones.
Z =
n
1
x
1
n
2
x
2
p(1 p )
n
1
1
n
2
1
+
x1 : Valor de dato de la muestra 1.
x2 : Valor de dato de la muestra 2.
n1 : Tamaño de la muestra 1.
n2 : Tamaño de la muestra 2.
ˆp : Proporción estimada de la muestra.
Sintaxis del comando
p1 condition”, valor x1, valor n1, valor x2, valor n2.
Definición de términos
p1 condition : Condiciones de la prueba de proporción de la muestra (“
especifica una prueba de dos colas, “<” especifica una prueba de
una cola en la que la muestra 1 es más pequeña que la muestra
2, “>” especifica una prueba de una cola en la que la muestra 1 es
más grande que la muestra 2).
x1 : Valor de dato (entero, x1 > 0) de la muestra 1.
n1 : Tamaño de la muestra 1 (entero positivo).
x2 : Valor de dato (entero, x2 > 0) de la muestra 2.
n2 : Tamaño de la muestra 2 (entero positivo).
Ejemplo de entrada
TwoPropZTest ">",15,20,25,30
Salida del resultado de cálculo
p1>p2 :Condición de la prueba.
z :Valor z.
p :Valor p.
ˆp 1 :Proporción estimada de la muestra 1.
ˆp 2 :Proporción estimada de la muestra 2.
ˆp :Proporción estimada de la muestra.
n1 :Tamaño de la muestra 1.
n2 :Tamaño de la muestra 2.
7-9-5
Pruebas
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