A measure of the average value of a random variable is called a(n) _____.
A) variance
B) standard deviation
C) expected value
D) None of the answers is correct.

Question

Quizplus · Accepted Answer

The expected value is a measure of the central tendency of a random variable and represents the average outcome if the same experiment is repeated many times. The variance and standard deviation, on the other hand, measure the spread or dispersion of the random variable around its expected value. None of the answers is not correct because they all have specific meanings and applications in statistics.

A Measure of the Average Value of a Random Variable