Examples:
E(X) = 0(1/16) + 1(4/16) + 2(6/16) + 3(4/16) + 4(1/16)
= 0/16 + 4/16 + 12/16 + 12/16 +4/16
= 32/16 = 2
X |
0 |
1 |
2 |
3 |
4 |
P(X = x) |
1/16 |
4/16 |
6/16 |
4/16 |
1/16 |