p kapgof module to compute confidence intervals for the kappa statistic
p kaplansky module to graph examples of distributions of varying kurtosis 
p kapprevi module to plot the dependence of kappa statistic on true prevalence
p kaputil module to generate confidence intervals and sample size calculations for the kappa-statistic
p kdbox module to generate kernel density plot with boxplot
p kdens module for univariate kernel density estimation
p kdens2 module to estimate bivariate kernel density
p kdmany module to perform kernel density estimation for several variables
p keepvar module to keep a list of variables in the order of their appearance in the list
p kernreg1 module to compute kernel regression (Nadaraya-Watson estimator) 
p kernreg2 module to compute kernel regression (Nadaraya-Watson estimator) 
p keyby module to key the dataset by a variable list
p keyplot module to generate scatter plot with keys in user-chosen positions
p khb module to decompose total effects into direct and indirect via KHB-method
p kountry module to standardize country names across various datasets
p kpss module to compute Kwiatkowski-Phillips-Schmidt-Shin test for stationarity
p kr20 module to calculate Kuder-Richardson coefficient of reliability
p kwallis2 module to perform Kruskal-Wallis Test for equality of populations