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Se inspecciona un lago en repetidas ocasiones para determinar los niveles de concentracin de un contaminante particular. Se sospecha que el nivel medio de concentracin

Se inspecciona un lago en repetidas ocasiones para determinar los niveles de concentracin de un contaminante particular. Se sospecha que el nivel medio de concentracin del contaminante excede los 0,0082 mg/litro, considerado aceptable. En base a una muestra de 120 lecturas se obtiene una media de 0,0088 y una desviacin estndar de 0,0022. Existe evidencia suficiente que apoye la sospecha? Utilice un nivel de significacin de 1%?

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