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Discrete R.V. Key Concepts (short)

# Discrete R.V. Key Concepts (short) - Addition rule 29 29 29...

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Key Concepts of Discrete Random Variables (Summarized from Sections 5.1 through 5.3 and “1 Discrete RV.ppt”) A random variable is discrete if and only if it can take on no more than a countable number of distinct integer values. Results from a counting process. Discrete values are mutually exclusive and are independent of each other. Essential Characteristics: 0 Prob ( xi ) 1. Σ Prob ( x i ) = 1.
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Unformatted text preview: Addition rule: ( 29 ( 29 ( 29 j i j i x x x x Prob Prob or Prob + = • • Multiplication rule: ( 29 ( 29 ( 29 j i j i x x x x Prob Prob and Prob × = • Expected value E ( X ) or μ ( 29 ( 29 ∑ = = N i i i x x X E 1 Prob • Variance σ 2 and standard deviation σ . ( 29 ( 29 ∑ = μ-= σ N i i i x x 1 2 2 Prob 2 σ = σ Discrete R.V. Key Concepts 1 of 1 © 2009 Harvey Singer...
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