Basic Statistics - Old Questions
Question Answer Details
7. Define random variable. A random variable X has the following probability function:
| X | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| P(X) | 0.1 | C | 0.2 | 2C | 0.3 | C |
Find:
(i) The value of C.
(ii) P(X < 3), P(X ≥ 1).
(iii) Mean and variance. [5]
Answer
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