obs DX E PW PX PZ Y

ECONOMETRIA 1
Profesor: Ramón Rosales
Complementarios:
Mónica Reyes
Camilo Gutiérrez
Monitoras:
Maria Adelaida Ortega
Ana Margarita Chiquiza
EJC 1: ANALISIS DE CORRELACIÓN – DEMANDA
1. Datos hipotéticos demanda:
obs
1
2
3
4
5
6
7
8
9
10
11
12
13
DX
37
38
18
50
22
55
42
29
63
13
60
62
36
PX
7
6
10
4
9
2
8
8
2
12
3
3
6
PZ
5
7
3
9
3
12
5
5
18
2
9
10
5
PW
7
5
13
4
11
3
8
9
3
15
5
5
6
ING ESTRATO
6
1
8
1
3
2
18
1
3
3
21
3
2
2
19
3
20
3
6
1
12
1
5
2
26
1
2. Estadísticas Descriptivas:
stats |
dx
px
pz
pw
ing
---------+-------------------------------------------------N |
13
13
13
13
13
min |
13
2
2
3
2
max |
63
12
18
15
26
mean |
40.38
6.15
7.15
7.23
11.46
sd |
16.8994
3.21056
4.43182 3.811252 8.272599
kurtosis |
1.80102 1.946736 3.713055 2.477177 1.643433
skewness | -.1141205 .2014559 1.101243 .7836294 .3946007
------------------------------------------------------------
3. Matriz de Covarianzas:
dx
px
pz
pw
ing
-----+--------------------------------------------dx |
285.59
px | -51.9808 10.3077
pz | 65.0192 -12.609
19.641
pw | -58.2628 11.6282 -13.7051 14.5256
ing |
51.891 -14.0769 18.0897 -17.5321 68.4359
1
4. Matriz de Correlación:
|
dx
px
pz
pw
ing
-------------+--------------------------------------------dx |
1.0000
px | -0.9581
1.0000
pz |
0.8681 -0.8862
1.0000
pw | -0.9046
0.9503 -0.8114
1.0000
ing |
0.3712 -0.5300
0.4934 -0.5561
1.0000
5. Diagrama de Dispersión:
12
10
PX
8
6
4
2
60
50
40
30
20
10
DX
2