STAT 2300 Chapter 6.1

a variable that assumes numerical values associated with the outcomes of a probability experiment, where one (and only one) numerical value is assigned to each outcome

has either a finite number of possible values or a countable number of values (many, number, fewer)

has an infinite number of values that are not countable (any number on number line)

if you count to find a variable it is ____

if you measure to find a variable it is___

discrete random variable X lists the possible values of the random variable and their corresponding probabilities. table graph or mathematical formula

x • p(x) = ( variable times ( times of occurrence) )

Ux

(x-u)^2 (p(x))

μ