U4.6 Random Variables — Mean and SD
Distinguish discrete vs. continuous random variables. Compute the mean (expected value) μ_X = Σ x · P(x) and standard deviation σ_X = √Σ(x−μ)²·P(x) for a discrete random variable.
What you'll do in this lesson
A voice-first session with the Crimsora tutor on U4.6 Random Variables — Mean and SD, then targeted practice and FRQs — with the tutor adapting to where you get stuck.