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Section 5.2

Random Variables

TermDefinition
Random Variable a variable (typically represented by x) that has a single numerical value, determined by chance, for each outcome of a procedure
Probability Distribution a description that gives the probability for each value of the random variable; often expressed in the format of a graph, table, or formula.
Continuous Random Variable infinitely many values, and those values can be associated with measurements on a continuous scale without gaps or interruptions
Discrete Random Variable either a finite number of values or countable number of values, where "countable" refers to the fact that there might be infinitely many values, but they result from a counting process
Range Rule of Thumb most values should lie within 2 standard deviations of the mean
Expected Value of a discrete random variable is denoted by E; it represents the man value of the outcomes
Created by: hfanch24
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