Probability Distributions

Choose the correct examples of discrete variable.

Given a random variable X between 0 and 3, if P(0) = .15, P(1) = .2, P(2)= .3, P(3) =?

From the following Prob Dist, which of these is most likely the mean?

How to find the standard deviation of a random variable or SD (X)?

A Random Variable X can take only two values, 1 and 2P(1) = 0.8 and P(2) = 0.2. Calculate the Expected value of X.

A Random Variable X can take only two values, 1 and 2P(1) = 0.8 and P(2) = 0.2. Calculate the variance of X.

A cubical die is biased. The numbers one to five are equally likely to land face up, but six is twice as likely to land face up as each of the other numbers.If X is the score shown  on the uppermost face, calculate the expected value of X.

Two fair coins are tossed.If Y represents the number of tails, what is the Expected Value of Y?