Unformatted text preview: μ x = ∑ i x i f ( x i ) • Standard deviation of a discrete random variable: σ x = p ∑ i ( x iμ ) 2 f ( x i ) • Mean of an empirical distribution: ¯ x = ∑ i x i h ( x i ) • Standard deviation of an empirical distribution: s = q n n1 ( ∑ i ( x i¯ x ) 2 h ( x i )) • Binomial probability formula: f ( x ) = ( n x ) p x (1p ) nx • Mean of a binomial random variable: μ = np • Standard deviation of a binomial random variable: σ = p np (1p ) 1...
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 Fall '07
 Guggenberger
 Economics, Standard Deviation, Probability theory, discrete random variable, [email protected]

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