If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Unit: Random variables

AP Stats: UNC (BI), UNC‑3 (EU), VAR (BI), VAR‑5 (EU)

0

Possible mastery points
Level up on the above skills and collect up to 300 Mastery points
AP Stats: VAR (BI), VAR‑6 (EU), VAR‑6.A (LO), VAR‑6.A.2 (EK), VAR‑6.A.3 (EK), VAR‑6.B (LO), VAR‑6.B.1 (EK), VAR‑6.B.2 (EK)
Practice
Probability in density curvesGet 3 of 4 questions to level up!
Probability in normal density curvesGet 3 of 4 questions to level up!
Level up on the above skills and collect up to 300 Mastery points
Level up on the above skills and collect up to 200 Mastery points
Level up on the above skills and collect up to 400 Mastery points
Level up on the above skills and collect up to 300 Mastery points
Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 1500 Mastery points!

About this unit

A random variable is some outcome from a chance process, like how many heads will occur in a series of 20 flips (a discrete random variable), or how many seconds it took someone to read this sentence (a continuous random variable). We calculate probabilities of random variables, calculate expected value, and look what happens when we transform and combine random variables.
AP® is a registered trademark of the College Board, which has not reviewed this resource.