Which one of the following charts represents a probability distribution?
a)
X | P(x)
0 | 0.1
1 | 0.2
2 | 0.4
3 | 0.1
b)
X | P(x)
0 | 0.3
1 | 0.2
2 | 0.1
3 | 0.35
c)
X | P(x)
0 | -0.1
1 | 0.1
2 | 0.4
3 | 0.6
d)
X | P(x)
0 | 0
1 | 0
2 | 1
3 | 0
a)
b)
c)
d)
Answer
d)
X | P(x)
0 | 0
1 | 0
2 | 1
3 | 0
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