Lecture10

In other words a random variable is a function x r

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Unformatted text preview: ords, a random variable is a function X : Ω → R, where Ω is the sample space of the random experiment under consideration and R represents the set of all real numbers. Notes Random Variable (r.v.) Expected Value Variance 10.3 Expected Value and Variance Expected Value The expected value of a discrete r.v. X , denoted by E[X ] is defined by E[X ] = x × pX (x ) x Remark: The expected value of a discrete r.v. is a weighted average of its possible values, and the weight used is its probability. So...
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