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Probability Distributions

A probability distribution is a listing of all possible outcomes, or events with a probability assigned to each outcome. Let’s use a stop light as an example, if during one cycle of the stop light is red 30 seconds, green 25 seconds, and yellow 5 seconds

Color Seconds Probability
Red 30 50%
Green 25 42%
Yellow 5 8%
  60 100%

As you approach the intersection with stoplight, the chance of coming upon red, green or yellow is: 50%, 42%, and 5% respectively.