CK-12 Foundation
Ck 12: Probability: Discrete and Continuous Random Variables
[Free Registration/Login may be required to access all resource tools.] This Concept introduces students to discrete and continuous variables.
CK-12 Foundation
Ck 12: Statistics: Normal Distributions
[Free Registration/Login may be required to access all resource tools.] Determine if a data set approximates a normal distribution.
Rice University
Hyper Stat Online Statistics Textbook: Continuous and Discrete Variables
The basic definitions of continuous and discrete statistics variables are provided here.