9. Suponga que Jack y Diane intentan usar una simulaci�n para descri.pdf

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Jack y Diane realizan simulaciones para describir la distribución de muestras de una población sesgada a la derecha. Se espera que la distribución de medias de Jack esté sesgada a la derecha pero no tanto como la población original, mientras que la distribución de medias de Diane se aproximará a una normal debido a su mayor tamaño de muestra. La media de ambas distribuciones se espera que sea 50, pero la desviación estándar de Jack será mayor que la de Diane.

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9. Suponga que Jack y Diane intentan usar una simulacin para describir la distribucin de
muestreo de una poblacin que est sesgada a la derecha con una media de 50 y una desviacin
estndar de 5. Jack obtiene 1000 muestras aleatorias de tamao n=4 de lapoblacin, encuentra el
media de las medias y determina la desviacin estndar de las medias. Diane hace la misma
simulacin, pero obtiene 1000 muestras aleatorias de tamao n=40 de la poblacin. Complete las
partes (c) a continuacin.
(a ) Describa la forma que espera para la distribucin de medias muestrales de Jack. Describe la
forma que esperas para la distribucin de medias muestrales de Diane. Elija la respuesta correcta a
continuacin.
Se espera que la distribucin de Jack est sesgadaa la derecha,pero no tanto como la distribucin
original. Se espera que la distribucin deDianesea aproximadamente normal.
(b) Cul espera que sea la media de la distribucin de Jack? Cul espera que sea la media de la
distribucin de Diane?
Se espera que la distribucin de Jacktenga una media de50. Se espera que la distribucin de Diane
tenga una media de 50.
(c) Cul espera que sea la desviacin estndar de la distribucin de Jack? Cul espera que sea la
desviacin estndar de la distribucin de Diane?
Se espera que la distribucin de Jack tenga una desviacin estndar de __?___ . Se espera que la
distribucin de Diane tenga una desviacin estndar de __?___.( Redondeea dos decimales segn sea
necesario).
3. Determine u x y o x a partir de los parmetros dados de la poblacin y el tamao de la muestra.
u = 89, o = 7, n = 49
ux = ?
buey = ?

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