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9: Prueba de hipótesis con una muestra

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    Un trabajo de un estadístico es hacer inferencias estadísticas sobre poblaciones a partir de muestras tomadas de la población. Los intervalos de confianza son una forma de estimar un parámetro poblacional. Otra forma de hacer una inferencia estadística es tomar una decisión sobre un parámetro. Por ejemplo, un concesionario de autos anuncia que su nueva camioneta pequeña obtiene 35 millas por galón, en promedio. Un servicio de tutoría afirma que su método de tutoría ayuda al 90% de sus estudiantes a obtener una A o una B. Una empresa dice que las mujeres gerentes de su empresa ganan un promedio de $60,000 al año.


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