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MATEMÁTICAS Y ESTADÍSTICA
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CURSO Y GRUPO:
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ENUNCIADO DEL EXAMEN
1ª) Tomada al azar una muestra de 90 empresas, se ha obtenido la siguiente distribución acerca del número de puestos de trabajo creados en cada una de ellas en el último año:
Puestos de trabajo
Número de empresas
0 a 10
5
10 a 20
7
20 a 30
16
30 a 40
20
40 a 50
22
50 a 60
11
60 a 70
9
Se pide:
Calcular la media aritmética de la distribución mediante el método directo y el clave.
El número de puestos de trabajo que crearán el 50% de las empresas.
Número de puestos de trabajo creado más común.
El primer y tercer cuartil, el segundo y séptimo deciles y los percentiles 25, 37 y 92.
La media geométrica de la distribución.
Calcular la desviación media, la desviación típica y la varianza de la serie.
Calcular el coeficiente de asimetría de la distribución en función de los momentos.
Interpretar el tipo y grado de asimetría.
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Enviado por: Servidor Bob Idioma: castellanoPaís: España