Formulas Chapter Four: Discrete Random Variables Randall Miller•Key Symbols o( )px→Probability distribution for discrete random variable xo( )fx→Probability distribution for continuous random variable xoS→Outcome of binomial trial denoted “success” oF→Outcome of binomial trail denoted “failure” o( )p PS→in binomial trial o( )q PF→in binomial trial oe→Constant used in Poisson probability distribution; e= 2.71828… •Formulas Characteristics of a Binomial Random Variable 1.The experiment consists of nidentical trials. 2.There are only two possible outcomes on each trail.
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