oh my - so many different methods to calculate percentiles
http://www.amstat.org/publications/jse/v14n3/langford.htmlGosh - I did not realize there were so many different ways to calculate percentiles! I just noticed my results from Excel (formula =percentile (array, percentile) and JMP (quantile plots and data) differed, and that led me to the above website, which identifies about 12 or more different methods! I am at a bit of a loss, for I often use res...