Discrete Random Variables

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A discrete random variable maps outcomes to values of a countable set (e.g., the integers), with each value in the range having probability greater than or equal to zero.

Discrete Probability[edit | edit source]

Mean and Variance[edit | edit source]

Expected Value

Variance

Binomial Distribution[edit | edit source]

, where p is the probability of successes in n independent trials.

Jointly distributed variables[edit | edit source]

Conditional Probabilities[edit | edit source]

Covariance and Correlation[edit | edit source]

Other useful results[edit | edit source]