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I-Jn experimento para estudiar la duracin (en horas) de un cierto tipo de componente implicaba poner 50 componentes en operacin y observarlos durante 100

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I-Jn experimento para estudiar la duracin (en horas) de un cierto tipo de componente implicaba poner 50 componentes en operacin y observarlos durante 100 horas. Cuarenta de ellos fallaron durante dicho periodo y se registraron las duraciones, y los restantes duraron hasta 120 horas. Las observaciones muestrales resultantes se presentan en la siguiente tabla. NO de Horas [20 ; 40 > [80; 100> [100; 1201 [ 40 a) Calcule el cuartil 3 . 60 4 8 9 b) Calcule el nmero de horas de duracin promedio.

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