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II. (Valor 35%) El puntaje promedio de ciertos estudiantes en una prueba de aptitud es de 72 puntos con una varianza de 36 puntos. Cul

II. (Valor 35%) El puntaje promedio de ciertos estudiantes en una prueba de aptitud es de 72 puntos con una varianza de 36 puntos. Cul es la probabilidad de que dos grupos de 28 y 36 estudiantes, respectivamente, difieran en sus puntajes promedio por

1. 3 puntos o ms

2. Entre 2 y 5 puntos?

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