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De acuerdo con la Sleep Foundation, en promedio se duermen 7.5 horas por noche. Suponga que la desviacin estndar es 0.8 horas y que la
De acuerdo con la Sleep Foundation, en promedio se duermen 7.5 horas por noche. Suponga que la desviacin estndar es 0.8 horas y que la distribucin de probabilidad es normal. Cul es la probabilidad de que una persona seleccionada al azar duerma menos de ocho horas
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