Consider the following with respect to Probability distribution :
(A) In a given sample space not more than four random variables can be defined
(B) Mean expectation values is a parameter and not a statistic
(C) In a Gaussain distribution if only mean and mode are same it is said to be normally distributed
(D) Probability of 'r' success 'n' Bernoulli is $P(r)={^nC}_rq^rp^{n-r}$
(E) Variables enables us to study the variability of a random variable from the mean expectation
Choose the correct answer from the options given below :
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B) and (E) only
(B) Since, expectation (Mean) is a theoretical value of a population, it is parameter.
(E) Variance measures the spread of a random variable around its mean.