Suppose X is a discrete random variable with mass px(x) = l/4 for x = 1,2,3,4, and

Question:

Suppose X is a discrete random variable with mass
px(x) = l/4 for x = 1,2,3,4,
and px(x) = 0 otherwise. For future reference, this is a called a Discrete Uniform distribution. We will study these random variables more in Chapter 20.
a. Make a plot of the probability mass function.
b. What is the CDF of X?
c. Make a plot of the CDF.