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Un fabricante produce focos que tienen un promedio de vida con distribucin aproximadamente normal y una desviacin estndar de 40 horas. Si una muestra de

Un fabricante produce focos que tienen un promedio de vida con distribucin aproximadamente normal y una desviacin estndar de 40 horas. Si una muestra de 30 focos tiene una vida promedio de 780 horas, encuentre un intervalo de confianza del 96% para la media poblacional de todos los focos que produce esta empresa.

EN LOS INTERVALOS DE CONFIANZA COLOCAR LOS DATOS INICIALES, REEMPLAZAR LOS VALORES Y SU CONCLUSION.

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