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Las siguientes son las prdidas semanales promedio de horas.pdf

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Las siguientes son las prdidas semanales promedio de horas-trabajador debido a accidentes en 10 plantas industriales antes y despus de la puesta en marcha de cierto programa de seguridad. Antes: 45 73 46 124 33 57 83 34 26 17 Despus: 36 60 44 119 35 51 77 29 24 11 a) Use un nivel de significancia del 5% para probar si el programa de seguridad es efectivo. b) Encuentre el intervalo de confianza del 90% para la mejora media en las horas-trabajador perdidas. c) Podemos concluir con un nivel de significancia del 1% que la desviacin estndar de la mejora en las horas-trabajador perdidas es inferior a 5 horas?.

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Las siguientes son las prdidas semanales promedio de horas-trabajador debido a accidentes en 10 plantas industriales antes y despus de la puesta en marcha de cierto programa de seguridad. Antes: 45 73 46 124 33 57 83 34 26 17 Despus: 36 60 44 119 35 51 77 29 24 11 a) Use un nivel de significancia del 5% para probar si el programa de seguridad es efectivo. b) Encuentre el intervalo de confianza del 90% para la mejora media en las horas-trabajador perdidas. c) Podemos concluir con un nivel de significancia del 1% que la desviacin estndar de la mejora en las horas-trabajador perdidas es inferior a 5 horas?

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