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Se tiene una poblacin de 8 obreros calificados, los cuales tienen los siguientes ingresos por laborar horas extra a la semana: S/. 758, S/. 618,

Se tiene una poblacin de 8 obreros calificados, los cuales tienen los siguientes ingresos por laborar horas extra a la semana: S/. 758, S/. 618, S/. 550, S/. 589, S/. 720, S/. 575, S/. 650, S/. 758.

a) Determinar la distribucin muestral de la media para muestras de tamao 3 con reposicin.

b) Con la distribucin de la parte a), determine qu tan probable es que la media muestral tenga un valor entre S/. 600 y S/. 700.

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