The mean of a discrete random variable x:
A) is denoted by
B) is denoted by E(x), because it is the value of x one can expect to find on average by numerous repetitions of the random experiment that generates the variable's actual values
C) is correctly described by both "is denoted by" and "is denoted by E(x), because it is the value of x one can expect to find on average by numerous repetitions of the random experiment that generates the variable's actual values"
D) is always = 0
E) is none of these

Question

Quizplus · Accepted Answer

The mean of a discrete random variable x is indeed denoted by E(x), which stands for the expected value of x. This expected value is what one can anticipate to find on average after many repetitions of the experiment that generates x's values, making option C the correct choice as it combines both accurate descriptions.

The Mean of a Discrete Random Variable X