Question

Asked Feb 26, 2019

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Step 1

Hello there ! I see that there are more than one questions here. Accoding to our policies cannot answer more than one question. So do find the solution to Exercise 2.

Step 2

Given a distribution of a discrete random variable. We need to check it if it is valid probability distribution or not.

A distribution is valid probability distribution if and only if All P(Xi) ≥ 0 and ∑P(Xi) = 1.

Here the first distribution is shown below

Here all probabilities are not greater than or equal to 0. We see P(X=0) = -0.25. This is not possible, So we say that this is not a valid probability distribution.

Step 3

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