Provided by the University of Vienna’s futureMedia initiative, the Maths Online Gallery consists of a large collection of extremely useful interactive learning units that demonstrate mathematical concepts. A large...

This site, created by the Department of Statistics at Yale University, gives an explanation, a definition and an example of mean and variance of random variables. Definitions and properties are also included. Overall,...

This site, presented by the Department of Statistics at Yale University gives an explanation, a definition and an example of random variables including discrete and continuous. It also defines a density curve. Overall,...

This course, presented by MIT and taught by Professor David Jerison, provides undergraduate level calculus instruction. The materials cover differentiation and integration of functions of one variable, with applications....

This site, presented by Statistics Canada, is a section from "Statistics: Power from Data!" on variable classification. It discusses categorical and numerical variables and their types. The site discusses these...