Which of the following can be a probability distribution function for a random variable X ?
A.
|
X |
0 |
1 |
2 |
|
P(x) |
0.4 |
0.4 |
0.2 |
B.
|
X |
1 |
2 |
3 |
4 |
|
P(x) |
0.1 |
0.4 |
0.3 |
-0.2 |
C.
|
X |
1 |
2 |
3 |
4 |
|
P(x) |
1/5 |
2/5 |
1/5 |
1/5 |
D.
|
X |
0 |
1 |
2 |
3 |
|
P(x) |
0.2 |
0.3 |
0.2 |
0.2 |
E.
|
X |
1 |
2 |
3 |
|
P(x) |
1/3 |
2/3 |
1/3 |
Choose the correct answer from the options given below
Answer & explanation
Correct answer: option 2
B. can't be the Probability Distribution form for random variable X as it contains negative value.