Dictionary

rankit en · NOUN

Etymology

Possibly a blend of rank + unit, along the lines of probit.

Meanings

1. The expected value of the nth largest value (for some n) in a standard normal distribution sample of a particular size, used in normality testing.
   • For a sample size of 6, the rankits are approximately −1.2672, −0.6418, −0.2016, 0.2016, 0.6418, and 1.2672. This means, for example, that the second largest value of a sample is likely to be around 0.6148.
   • A special problem illustrated in this example is the case of ties, or variates of identical magnitude. In such a case we sum the rankit values for the corresponding ranks and find their mean. 1969, Robert R[euven] Sokal, F. James Rohlf, Biometry: The Principles and Practice of Statistics in Biological Research, San Francisco, C.A.: W. H. Freeman and Company, page 124:

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