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UNIVERSIDAD NACIONAL FEDERICO VILLARRREAL
   Facultad de Ingeniería Industrial y de Sistemas
        Escuela Profesional de Ingeniería de Sistemas




         PROBLEMA PRÁCTICO DE DISEÑO MUESTRAL

      Curso    : Marketing
      Profesor : Ing. Irma Castillo Herbas y Ing. Alexander
      Nombre : Ventocilla Riquelme, Medaly Miriam
      Código    : 2008032639
      Sección : “B”



                       Lima – Perú

                             2011
Problema nº1.

En una investigación de mercado correspondiente se quemo la información
concerniente al año presente 2011. Sin embargo se pudo restaurar el siguiente
cuadro:

                       Uso de            Uso de camisas       Uso de medias
                       pantalones
Censo 2008             12000             20000                28000
Censo 2009             13000             25000                370000
Censo 2010             15000             35000                55000
Total                                    80000


Asimismo se supo en el año 2010 la compra fue el 40% de chompas, 30%
zapatillas y el 20 % de camisas con la información dada hallar: El universos,
tamaño de la muestra, Margen de seguridad y el Límite de variante.

Datos:

        Z=2
        p=20
        q=80
        e=s=4

Solución:

1. El universo(N).

         N=80000/3 =26666.67=26667

2. Tamaño de la Muestra(n).

         n

         n

         n           = 3964 encuestas

3. Margen de Seguridad (M.S.).

         M.S
4.-. Limite de variación.

      Límite Inferior (Li) =3964-159 =3805 encuestas

      Límite superior (Ls) =3964+159 =4123 encuestas

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Diseño muestral de investigación de mercado sobre uso de prendas de vestir 2008-2010

  • 1. UNIVERSIDAD NACIONAL FEDERICO VILLARRREAL Facultad de Ingeniería Industrial y de Sistemas Escuela Profesional de Ingeniería de Sistemas PROBLEMA PRÁCTICO DE DISEÑO MUESTRAL Curso : Marketing Profesor : Ing. Irma Castillo Herbas y Ing. Alexander Nombre : Ventocilla Riquelme, Medaly Miriam Código : 2008032639 Sección : “B” Lima – Perú 2011
  • 2. Problema nº1. En una investigación de mercado correspondiente se quemo la información concerniente al año presente 2011. Sin embargo se pudo restaurar el siguiente cuadro: Uso de Uso de camisas Uso de medias pantalones Censo 2008 12000 20000 28000 Censo 2009 13000 25000 370000 Censo 2010 15000 35000 55000 Total 80000 Asimismo se supo en el año 2010 la compra fue el 40% de chompas, 30% zapatillas y el 20 % de camisas con la información dada hallar: El universos, tamaño de la muestra, Margen de seguridad y el Límite de variante. Datos:  Z=2  p=20  q=80  e=s=4 Solución: 1. El universo(N). N=80000/3 =26666.67=26667 2. Tamaño de la Muestra(n). n n n = 3964 encuestas 3. Margen de Seguridad (M.S.). M.S
  • 3. 4.-. Limite de variación. Límite Inferior (Li) =3964-159 =3805 encuestas Límite superior (Ls) =3964+159 =4123 encuestas