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Data Analysis, Statistics, and Probability
Probability
Probability refers to the chance that a specific outcome can occur. When outcomes are equally likely, probability can be found by using the following definition:
For example, if a jar contains 13 red marbles and 7 green marbles, the probability that a marble selected from the jar at random will be green is
If a particular outcome can never occur, its probability is 0. If an outcome is certain to occur, its probability is 1. In general, if p is the probability that a specific outcome will occur, values of p fall in the range 0 ≤ p ≤ 1. Probability may be expressed as either a decimal, a fraction, or a ratio.
