2. Probability Theory

Random Variables — Quiz

Test your understanding of random variables with 5 practice questions.

Practice Questions

Question 1

Which of the following describes the range of values a discrete random variable can take?

Question 2

If $X$ is a discrete random variable, what is the sum of all probabilities in its probability mass function (PMF)?

Question 3

Which of the following is an example of a continuous random variable?

Question 4

For a probability density function (PDF) $f(x)$ of a continuous random variable $X$, which of the following conditions must be true for all $x$?

Question 5

If $X$ is a continuous random variable with a PDF $f(x) = 3x^2$ for $0 \le x \le 1$, and $f(x) = 0$ otherwise. What is $P(0.1 \le X \le 0.5)$?