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2) Un gerente de ventas de libros universitarios afirma que en promedio sus representantes de ventas realiza 40 visitas a profesores por semana&arios de

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2) Un gerente de ventas de libros universitarios afirma que en promedio sus representantes de ventas realiza 40 visitas a profesores por semana&arios de estos representantes piensan que rea lizan un nmero de visitas promedio superior a 40. Una muestra tomada al azar durante 8 semanas reve16 un promedio de 42 visitas semanalesyuna desviacin estndar de 2 visitas.Utilice un nivel deconfianza del 99% para aclarar esta cuestin.

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