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Una empresa de investigacin llev a cabo una encuesta para determinar la cantidad media que los fumadores gastan en cigarrillos durante una semana. La empresa

  • Una empresa de investigacin llev a cabo una encuesta para determinar la cantidad media que los fumadores gastan en cigarrillos durante una semana. La empresa descubri que la distribucin de cantidades que gastan por semana tenda a seguir una distribucin normal, con una desviacin estndar de $5. Una muestra de 49 fumadores revel que la media de gastos semanales era de $40.
  • Cul es el estimador puntual de la media de la poblacin? - -Explique su respuesta. Con el nivel de confianza de 95%, determine el intervalo de confianza de la media poblacional. Explique su significado.

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