Pprosentilen

Pprosentilen is a term used sporadically in statistical texts and software documentation. It is not part of the standard statistical vocabulary and there is no universally accepted definition. In many cases it is observed as a typographical variant of percentile, or as a coinage in specialized contexts.

If used as a recognized term, it often refers to a percentile-like measure, equivalent to a p-quantile of a distribution, where p is in [0,1]. In other words, it denotes the value below which a proportion p of observations fall, analogous to standard percentiles.

To estimate a pprosentilen from a sample of size n, one typically orders the data and computes the p-quantile. A common approach uses r = p(n+1); if r is an integer, the pprosentilen is the r-th order statistic x_(r); if not, it is obtained by interpolating between the surrounding order statistics.

Because the term is not standardized, definitions and calculation methods may vary by source or software implementation. When encountering pprosentilen, it is advisable to check the specific context to confirm whether it corresponds to a conventional percentile, a quantile, or a distinct, locally defined statistic.

See also: percentile, quantile, order statistics.