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Se ha obtenido una muestra de 80 productos y se calcula el promedio y desviacin muestral de sus ndices de dureza, en 7.5 y 0.30

Se ha obtenido una muestra de 80 productos y se calcula el promedio y desviacin muestral de sus ndices de dureza, en 7.5 y 0.30 respectivamente. a) Hallar, el intervalo de confianza para la media del lote completo, al 99 %. b) Si se pact con el cliente que se le entregara el producto con medidas 7.5 /-0.1, explicar si se puede llegar a cumplir interpretando el intervalo calculado

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