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2. Una muestra de 100 tubos de televisi6n producidos por una compafifa mostro un tiempo de vida medio de 1,200 horas y desviaci6n estndar

2. Una muestra de 100 tubos de televisi6n producidos por una compafifa mostro un tiempo de vida medio de 1,200 horas y desviaci6n estndar de 100 horas. Estime (a) la media, (b) la desviaci6n estndar de la poblaci6n de todos los tubos de televisi6n que produce esa compafa.

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