What is a characteristic of the mass function of a discrete random variable X?
A) The sum of probabilities P(X =x)over all possible values x is 1.
B) For every possible value x,the probability P(X =x)is between 0 and 1.
C) Describes all possible values x with the associated probabilities P(X =x).
D) All the above.

Question

Quizplus · Accepted Answer

The mass function of a discrete random variable X satisfies all three characteristics: (A) the sum of probabilities P(X = x) over all possible values x is 1, (B) for every possible value x, the probability P(X = x) is between 0 and 1, and (C) it describes all possible values x with the associated probabilities P(X = x).

What Is a Characteristic of the Mass Function of a Discrete