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Una muestra aleatoria de 20 observaciones tomada de una poblacin normal produjo una varianza muestral igual a 18,2. Determine si los datos proporcionan suficiente evidencia
Una muestra aleatoria de 20 observaciones tomada de una poblacin normal produjo una varianza muestral igual a 18,2. Determine si los datos proporcionan suficiente evidencia para afirmar que la varianza poblacional es mayor a 15. Haga la prueba con 5% de significancia.
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