# Gringorten plotting position

From AMS Glossary

## Gringorten plotting position

The Gringorten plotting position for the

*r*th ranked (from largest to smallest) datum from a sample of size*n*is the quotient:Gringorten, I. I. 1963. A plotting rule for extreme probability paper. J. Geophys. Res.. 68. No. 3, . 813–814.

Gumble, E. J. 1941. Probability interpretation of the observed return periods of floods. Trans., Amer. Geophys. Union. 21. 836–850.