Solution :
x | P(x) | xP(x) | x2P(x) | |
0 | 0.1 | 0 | 0 | |
1 | 0.2 | 0.2 | 0.2 | |
2 | 0.1 | 0.2 | 0.4 | |
3 | 0.5 | 1.5 | 4.5 | |
4 | 0.1 | 0.4 | 1.6 | |
Sum | 1 | 2.3 | 6.7 | |
Mean = ΣxP(x) = 2.3 | ||||
Variance = Σx2P(x) - (ΣxP(x))2 = 6.7 - (2.3)2 = 1.41 | ||||
Mean = 2.3 , Variance = 1.41 |
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