A probability density function
A)gives the probability that the random variable equals a specific value of x.
B)is used for discrete random variables.
C)describes the graph whose underlying area represents probability over an interval.
D)each of the above is true.

Question

Quizplus · Accepted Answer

A probability density function (PDF) is used for continuous random variables and describes the graph whose underlying area represents probability over an interval. It is not used to give the probability that the random variable equals a specific value of x, as that would be a probability mass function (PMF) for discrete random variables.

A Probability Density Function