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6) Un fabricante de tornillos asegura que la longitud de sus tornillos tiene distribucin normal con una desv'iaci6n estndar igual a 0,2 mil(metros. Para

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6) Un fabricante de tornillos asegura que la longitud de sus tornillos tiene distribucin normal con una desv'iaci6n estndar igual a 0,2 mil(metros. Para comprobar la especificacin de la variaci6n se tom6 una muestra aleatoria de diez de estos tornillos, observndose las longitudes en milfmetros.ms, 208, 20.26, 20.72, 20.69, 20.37, 20.7, 20.32, 20.96, 20.40. Con un nivel de significacin del 0,05 y con una prueba unilateral, Satisface esta produccin la especificacin de la variabilidad de la longitud?.

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