The Importance of Randomization
When gathering data (sampling) from a population for the purpose of describing as well as making inferences on said population, randomization is essential. Why? "Random sampling eliminates bias by giving all individuals an equal chance to be chosen."(1) and, the “mathematical theorems that are the foundation for frequently used statistical procedures are based on this assumption”(2). When facilitating training in Six Sigma, I often “quiz” students after we have journeyed fo