Examen Estadística – 4 –

      384 comentarios en Examen Estadística – 4 –
Parte 1 de 10 – punto 9 0.5/ 0.5 Puntos
Preguntas 1 de 10
0.5/ 0.5 Puntos
La siguiente tabla contiene datos invertidos en publicidad (en millones de pesos) que se reflejan en las ventas mensuales (en millones de pesos) de la compañía, si se sabe que la tendencia es lineal determine su ecuación y calcule cuanto tiene que invertir la compañía si desea ganar 80000 millones

PUBLICIDA VENTAS
1 43124
3 45141
6 48168
7 49177
10 52204
11 53213
La inversión en publicidad debe estar alrededor de:
C
MUY BIEN
Parte 2 de 10 – punto1 0.5/ 0.5 Puntos
Preguntas 2 de 10
0.5/ 0.5 Puntos
La siguiente definición “Se dedica a la descripción, organización, síntesis, y análisis de la información; pero sin llegar a conclusiones fuertes y profundas sobre la misma.” Corresponde a:

D
MUY BIEN
Parte 3 de 10 – punto2 0.5/ 0.5 Puntos
Preguntas 3 de 10
0.5/ 0.5 Puntos
La siguiente distribución de frecuencia significa la venta de artículos diarios de una empresa

ARTICULOS DIAS
80 1
82 3
85 2
86 5
89 5
90 4
92 5
94 5
95 6
97 5
99 5
100 2
102 2
ReResponder la siguiente pregunta ¿número de días que se venden mínimo 90 pero menos  de 97 artículos?
A
muy bien
Parte 4 de 10 – punto3 0.5/ 0.5 Puntos
Preguntas 4 de 10
0.5/ 0.5 Puntos
3. En proceso de selección de personal de una compañía, la escolaridad vale un 35%, la experiencia laboral un 30% , las pruebas sicotécnicas 15% y la entrevista 20% los ítem se califican de 1 a 50 los puntajes de un candidato fueron:

Escolaridad 45
Experiencia 35
Pruebas sicotécnicas 30
Entrevista 10

El resultado promedio sin decimales del candidato fue de:

B
MUY BIEN
Parte 5 de 10 – punto4 0.5/ 0.5 Puntos
Preguntas 5 de 10
0.5/ 0.5 Puntos
 El Gerente general de industrias petete tiene cuatro grupos de empleados, estos fueron capacitados en salud ocupacional en el mes de junio, en diciembre fueron evaluados con prueba escrita y los resultados que se obtuvieron fueron los siguientes. (La calificación de las notas se hace de 0 a 5)

AREA MEDIA MODA PROMEDIO VARIANZA
OPERARIOS 3 4 3,5 1,25
SECRETARIAS 2,9 4,5 3,3 1,03
CONDUCTORES 2,5 3 3,4 0,8
VENDEDORES 2,8 4 3 2

El tercer grupo a capacitarse según su grado de homogeneidad enviado por el gerente es:

B
MUY BIEN
Parte 6 de 10 – punto 5 0.5/ 0.5 Puntos
Preguntas 6 de 10
0.5/ 0.5 Puntos
Es el diagrama más utilizado para representar distribuciones de frecuencias agrupados por intervalos:

C
MUY BIEN
Parte 7 de 10 – punto6 0.5/ 0.5 Puntos
Preguntas 7 de 10
0.5/ 0.5 Puntos
Se realiza un análisis de regresión sobre los siguientes datos:

X Y
1,2 405
1,4 408
1,6 409
1,8 412
2,0 414

De las opciones ofrecidas al realizar el análisis de regresión la gráfica que más se ajusta es de tipo:

<o:p></o:p>

D
MUY BIEN
Parte 8 de 10 – punto 7 0.5/ 0.5 Puntos
Preguntas 8 de 10
0.5/ 0.5 Puntos
La siguiente tabla contiene datos anuales para la población colombiana (en miles de habitantes) desde 2004 hasta 2010

AÑO POBLACION
2004 43683
2005 43054
2006 44764
2007 46876
2008 47234
2009 48006
2010 49234

El análisis anterior muestra que la población colombiana ha aumentado durante los últimos años con una tendencia lineal dada en la siguiente ecuación y=1036,7x+41975. Para el año 2014 la población (en miles de habitantes) es de:

D
MUY BIEN
Parte 9 de 10 – punto9 0.5/ 0.5 Puntos
Preguntas 9 de 10
0.5/ 0.5 Puntos
Algunas veces se da una ruptura de tendencia, que es cuando la serie trae una tendencia definida y cambia bruscamente. En ese caso, si se quiere hacer pronósticos hay que tener en cuenta

C
MUY BIEN
Parte 10 de 10 – punto 10 0.5/ 0.5 Puntos
Preguntas 10 de 10
0.5/ 0.5 Puntos
En una serie cronológica el tiempo debe tomarse como variable dependiente

Falso
MUY BIEN

384 pensamientos en “Examen Estadística – 4 –

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