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# Probability plot

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### Probability plot

In statistics, a probability plot is a graphical technique for comparing two data sets, either two sets of empirical observations, one empirical set against a theoretical set, or (more rarely) two theoretical sets against each other. It commonly means one of:

• P–P plot, "Probability-Probability" or "Percent-Percent" plot;
• Q–Q plot, "Quantile-Quantile" plot, which is more commonly used.[1][2] Special cases include the

The term "probability plot" may be used to refer to both of these types of plot,[1] or the term "probability plot" may be used to refer specifically to a P-P plot.[3]

## Notes

1. ^ a b (Thode 2002, Section 2.2, Methods of Probability Plotting, p. 18)
2. ^ (Gibbons & Chakraborti 2003, p. 145)
3. ^ (Gibbons & Chakraborti 2003, p. 144)

## References

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