Polykay

In statistics, a polykay, or generalised k-statistic, (denoted $k_{{r,s}}$) is a statistic defined as a linear combination of sample moments.^[1]

Etymology

The word polykay was coined by American mathematician John Tukey in 1956, from poly, "many" or "much", and kay, the phonetic spelling of the letter "k", as in k-statistic.^[2]

References

1. "Polykay". Wolfram.
2. Tukey, J. W. (1956.) "Keeping Moment-Like Computations Simple", Ann. Math. Stat., 27:37–54.