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ESPOCH
FIE-EDG
ESTADÍSTICA
ING. FREDY NARANJO
INTEGRANTES:
YESENIA ASITIMBAY (1993)
MARTHA GUANO (1909)
STEFANY SÁNCHEZ (1994)
TEMA: MUESTREO PROBALISTICO ALEATORIO
ESTRATIFICADO PROPORCIONAL
Estratificado:
Se divide la población total en clases homogéneas, llamadas estratos; por ejemplo, por grupos de
edades, por sexo. Hecho esto la muestra se escoge aleatoriamente en número proporcional al de los
componentes de cada clase o estrato.
Estrato : También puede estar vinculado al nivel socioeconómico de los distintos sectores de la
sociedad. De esta manera, la sociedad puede dividirse en distintas clases o capas según su estrato.
Los estratos más bajos están formados por la población que recibe menos ingresos y, por lo tanto, tiene
un acceso reducido a los recursos y dificultades para satisfacer sus necesidades básicas. Los estratos
más altos, en cambio, se asocian a los sectores más ricos de la sociedad.
Los alumnos del tercero “B” de la escuela de diseño grafico periodo
marzo- agosto de 2012, se quiere extraer una muestra de 5 alumnos.
Población Régimen
1. Stefany Sánchez Sierra
2. Yesenia Asitimbay Sierra
3. Martha Guano Costa
4. Jorge Mazón Sierra
5. Wilmer Ninabanda Sierra
6. Andrés morales Sierra
7. Bruno Borja Costa
8. Juan Barragán Sierra
9. Alex Tingo Sierra
10. Gabriel Orozco Sierra
11. Marco Chávez Sierra
12. Cristian Zhañay Sierra
13. José Luis Yauripoma Oriente
14. Paul Carrillo Sierra
15. Byron Maggi Sierra
DATOS:
N=15
n=5
La formula a utilizar es:
Población: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
De la población escogemos una muestra al azar (n= 5)
Dividimos el numero de la población para el numero de la muestra
Dividimos el estrato por el numero de la población y lo multiplicamos por la
muestra.
ESTRATOS:
COSTA: 2
SIERRA: 12
ORIENTE: 1
15
0.65 0.7
0.33 + 0.3
0.8 (5) =4 4
5

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Estadistica

  • 1. ESPOCH FIE-EDG ESTADÍSTICA ING. FREDY NARANJO INTEGRANTES: YESENIA ASITIMBAY (1993) MARTHA GUANO (1909) STEFANY SÁNCHEZ (1994)
  • 2. TEMA: MUESTREO PROBALISTICO ALEATORIO ESTRATIFICADO PROPORCIONAL Estratificado: Se divide la población total en clases homogéneas, llamadas estratos; por ejemplo, por grupos de edades, por sexo. Hecho esto la muestra se escoge aleatoriamente en número proporcional al de los componentes de cada clase o estrato. Estrato : También puede estar vinculado al nivel socioeconómico de los distintos sectores de la sociedad. De esta manera, la sociedad puede dividirse en distintas clases o capas según su estrato. Los estratos más bajos están formados por la población que recibe menos ingresos y, por lo tanto, tiene un acceso reducido a los recursos y dificultades para satisfacer sus necesidades básicas. Los estratos más altos, en cambio, se asocian a los sectores más ricos de la sociedad.
  • 3. Los alumnos del tercero “B” de la escuela de diseño grafico periodo marzo- agosto de 2012, se quiere extraer una muestra de 5 alumnos. Población Régimen 1. Stefany Sánchez Sierra 2. Yesenia Asitimbay Sierra 3. Martha Guano Costa 4. Jorge Mazón Sierra 5. Wilmer Ninabanda Sierra 6. Andrés morales Sierra 7. Bruno Borja Costa 8. Juan Barragán Sierra 9. Alex Tingo Sierra 10. Gabriel Orozco Sierra 11. Marco Chávez Sierra 12. Cristian Zhañay Sierra 13. José Luis Yauripoma Oriente 14. Paul Carrillo Sierra 15. Byron Maggi Sierra
  • 4. DATOS: N=15 n=5 La formula a utilizar es: Población: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 De la población escogemos una muestra al azar (n= 5) Dividimos el numero de la población para el numero de la muestra
  • 5. Dividimos el estrato por el numero de la población y lo multiplicamos por la muestra. ESTRATOS: COSTA: 2 SIERRA: 12 ORIENTE: 1 15 0.65 0.7 0.33 + 0.3 0.8 (5) =4 4 5