Mathematics, 21.06.2021 18:30 barisege6030

Se supone que los resultados de un examen siguen una distribución normal con media 78 y desviación típica 36. Se pide: a). ¿Cuál es la probabilidad de que una persona que se presenta el examen obtenga una calificación superior a 72? b) Calcular la proporción de estudiantes que tienen puntuaciones que exceden por lo menos en cinco puntos de la puntuación que marca la frontera entre el Apto y el No - Apto (son declarados No - Aptos el 25% de los estudiantes que obtuvieron las puntuaciones más bajas).

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