Further approximate pearson percentage points and Cornish-Fisher

Abstract
A set of 19-point rational fraction approximants for Pearson distributions at levels a = 0.025, 0.25, 0.50, 0.75, and 0.975 is added to a previous study (Biometrika, 1979). The relation to a Cornish-Fisher expansion is discussed and advice proffered on interpolation for a new deviate or new level.