Which of the following is a required condition for a discrete probability function?
A) ∑f(x) = 0 for all values of x
B) f(x) 1 for all values of x
C) f(x)

Question

Which of the following is a required condition for a discrete probability function?
A) ∑f(x) = 0 for all values of x 
B) f(x) 1 for all values of x 
C) f(x) < 0 for all values of x 
D) ∑f(x) = 1 for all values of x

Quizplus · Accepted Answer

A discrete probability function must have a total probability of 1 for all possible outcomes. Therefore, the sum of all probabilities (represented by f(x)) must equal 1.

Which of the Following Is a Required Condition for a Discrete