
intervalos de confianza
Authored by Jose Carlos Bueno
Mathematics
12th Grade
Used 41+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Una muestra aleatoria de 85 lideres de grupo, supervisores y personal similar de Imcruz revelo que, en promedio pasan 6.5 años en su trabajo antes de ascender. La desviacion estandar de la muestra fue de 1.7 años. Construya el intervalo de confianza de 95%
Ninguno
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
El factor zα/2 que da un nivel de confianza del 99% para una muestra de 100 datos es
± 2,5758
± 2,3263
± 2,6264
± 2,7564
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Se sabe que la desviación típica de los volúmenes de las botellas de 710 ml de agua mineral embotellada por una empresa es de 6 ml. Se ha tomado una muestra aleatoria de 90 botellas y se han medido. Con un nivel de confianza del 95% el margen de error es
1,2396
1,4176
0,6325
1,2567
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
En una muestra aleatoria de 95 empresas manufactureras, 67 han indicado que su empresa ha obtenido la certificación ISO en los dos últimos años. Halle el intervalo de confianza al 99%
0,5848 – 0,8258
0,5823 – 0,8282
66,88 – 67,12
No se puede calcular
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Si queremos reducir los límites del intervalo de confianza se debe
Aumentar el nivel de confianza
Aumentar la varianza poblacional
Aumentar el tamaño de muestra
Aumentar el margen de error
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