Home
Class 12
MATHS
The variance of a random varibale x is d...

The variance of a random varibale x is defined by the expected value of `(x-barx)^(2)` where `bar x` is the mean of x prove that variance (x) =`E(x^(2))-{E(x)}^(2)`

Promotional Banner

Similar Questions

Explore conceptually related problems

Prove that variance E(X^2)-[E(X)]^2

If the variance of the random variable X is 5 ,then variance of the random variable -3X is

The random variable X has variance 4 and E(x^(2))=8 , then the mean of x is

Variance of the random variable X is 4 . Its mean is 2 . Then E (X^(2)) is …………. .

is the probability distribution of a random variable X. Find the value of K and the variance of X.

If X is a binomial random variable with expected value 6 and variance 2.4, then P(X=5) is

For a random variable X, if Var (X) = 4 and E(X^(2))=13 , the value of E(X) is

For a random variable X, if Var (X) = 4 and E(X^(2))=13 , the value of E(X) is