Black Ford
01/02/2023 · Junior High School
5. Las horas que duermen diariamente los estudiantes de una determinada universidad, definido por la variable aleatoria \( X \), se modela mediante una distribución normal con media 3,8 horas y desviación estándar 1,6 horas. Si \( Z \) es una variable de distribución normal tipificada, entonces la probabilidad de escoger al azar un estudiante que duerma más de 5,4 horas y menos de 7 horas es igual a: \( \begin{array}{lllll}\text { A. } 2,3 \% & \text { B. } 4,6 \% & \text { C. } 13,6 \% & \text { D. } 15,9 \% & \text { E. } 18,2 \%\end{array} \)
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La probabilidad es aproximadamente 13.6%. La respuesta correcta es C. 13,6 %.
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