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Los siguientes datos constituyen una muestra aleatoria de 15 medidas de la calificacion de octanaje de cierto tipo de gasolina: 99.0 102.3 99.8 100.5 99.7

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Los siguientes datos constituyen una muestra aleatoria de 15 medidas de la calificacion de octanaje de cierto tipo de gasolina: 99.0 102.3 99.8 100.5 99.7 96.2 99.1 102.5 103.3 97.4 100.4 98.9 98.3 98.0 101.6 (a) (4 puntos) Pruebe la hipotesis nula # = 98.0 contra la hipotesis alternativa u > 98.0 en el nivel de significacion de 0.01. (b) (4 puntos) Conclusion: La calificacion mediana de octanaje del tipo dado de gasolina excede 98.0

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