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Se sospecha que los C.I. de los estudiantes universitarios son menos variables que los C.I. de la gente en general, los cuales se distribuyen normalmente

Se sospecha que los C.I. de los estudiantes universitarios son menos variables que los C.I. de la gente en general, los cuales se distribuyen normalmente con una varianza de 250 ( = 250). Una muestra aleatoria de puntuaciones de C.I. para 26 estudiantes proporciona una varianza ( ) de 220. Utilizando = 0.05 prubese la hiptesis de que los C.I. de los estudiantes universitarios tienen menos variabilidad que los C.I. de toda la gente.

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