Discrete Random Variableand Probability

• A numerical outcome of an experiment

  • Number of tails in 2 coin tosses
    • Observe 0, 1, or 2 tails

• Discrete random variable

  • Whole number (0, 1, 2, 3 etc.)
  • Obtained by counting
  • Usually finite number of values
    • Poisson random variable is exception (?)

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