Ejercicios
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Ejercicios: 1. En una fabrica de muebles, la probabilidad de encontrar artículos defectuosos esta dado por la siguiente f.d.p., encontrar E[X], S2 y S. X 0 1 2 3 4 5 6 7 8 9 10 P [X = 0.06 0.07 0.17 0.25 0.23 0.15 0.06 0.02 0.00 0.00 0 x] 0 2 5 2 7 3 8 1 4 1 X
P[X =x]
0
0.060
1
0.072
2
0.072
3
0.072
4
0.072
5
0.072
6
0.072
7
0.072
8
0.072
9
0.072
10
0.072
xi P[ X = xi ]
E [X] = ∑ X i P[ X = xi ] =
( xi − E[ X ]) 2 P[ X = xi ]
S 2 = ∑ ( xi − E[ X ]) 2 P[ X = xi ] =
P[X =x]
0
0.060
1
0.072
2
0.072
3
0.072
4
0.072
5
0.072
6
0.072
7
0.072
8
0.072
9
0.072
10
0.072
xi P[ X = xi ]
E [X] = ∑ X i P[ X = xi ] =
( xi − E[ X ]) 2 P[ X = xi ]
S 2 = ∑ ( xi − E[ X ]) 2 P[ X = xi ] =
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