Which of the following statements are correct ?
(A) A random variable is a real valued function whose domain is the sample space of a random experiment.
(B) A die is tossed twice if x denotes the number of times 4 appears on the die then all possible values of random variable x are 0 and 1
(C) mathematical expectation value is a parameter and not a statistic
(D)
| x | 0 | 1 | 2 |
| P(x) | 0.4 | 0.2 | 0.1 |
is the probability distribution of a random variable
Choose the correct answer from the options given below :
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A) and (C) only
(A) A random variable assign real values to the outcomes of a random experiment.
(C) The mathematical expectation $E(X)$ is generally considered a parameter because it describe a property of probability distribution.