By Christian FOURNIER, Retired Head of Finance Europe at Orange Business Services, Author (Globalisation - adapter l'organisation de son entreprise face à la mondialisation...)
Are your KPIs, Scoreboards and other metrics safe from the Simpson's paradox?
“Simpson’s paradox or Yule-Simpson effect is a paradox in probability and statistics, in which a trend appears in different groups of data but disappears or reverses when these groups are combined. It is sometimes given the descriptive title reversal paradox or amalgamation paradox”. (Extract from Wikipedia)