I am working on process capability analysis for non normal data, and i need standardized tails of pearson curves which are used in clement's method to approximate the Upper and lower percentiles based on the values of kurtosis and skewness. Currently i am struggeling to find a library or any module that contains or implements these tables any help or tips on this matter?
I initially thought of hardcoding the tables and looking up the upper and lower percentiles depending of skewness and kurtosis values but i am aslo unable to find any digital copy of the tables .
