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EXAMEN DE ESTADÍSTICA DESCRIPTIVA Febrero 2000
1.
Industria A
Industria B
Salario
Nº
Salario
Nº
Directivos
5 M
2
4'5 M
1
Jefes
3'5 M
5
3'2 M
3
Administrativos
2'4 M
10
2'4 M
6
Oficiales
2'8 M
120
2'7 M
90
¿Cuál presenta la estructura más homogénea?
Si en a se modifican los salarios un 5 % y en B se incrementan linealmente 100.000 ptas, ¿cuál presenta mayor homogeneidad ahora?
2.
AÑOS
Consumo cemento (miles de TM)
Nº empleados (miles)
1990
120
60
1991
132
65
1992
132
60
1993
150
50
1994
132
65
1995
120
60
1996
120
65
1997
132
65
1998
150
75
1999
150
80
Estúdiese la función de regresión: (nº empleados) = A · (consumo cemento)B
Calcular el coeficiente de determinación.
3.
AÑOS
Alquiler (pesetas)
IPC (grupo viviendas) base 1992 =100 (media anual)
1995
50.000
118.460
1996
55.000
123.012
1997
60.000
127.227
1998
65.000
129.082
1999
65.000
131.781
Hallar la evolución sufrida a los alquileres reales pagados por esas familias.
Tasa de variación media acumulativa del periodo 95-99 en términos corrientes.
¿Qué alquiler debería haber satisfecho ésta familia en el periodo 96-99 si la modificación el alquiler hubiese estado indexada al IPC (grupo vivienda)?
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Enviado por: Benito Prieto Idioma: castellanoPaís: España