Month: December 2008

Recently, someone asked me if I could explain chi-square in a few words. The short answer is, “No, I am incapable of using only a few words for any purpose whatsoever. If you doubt this, ask any of my children.” What is chi-square? Chi-square is a measure of relationship between two categorical variables.  For example,…

Categorical data analysis used to be simple. You had two nominal variables and you did a chi-square analysis. If it was statistically significant, that was all it took to make life good. Then, logistic regression came along, with the reasonable notion that: A. Dichotomous choices such as bought a candy apple/ate tofu & bean sprouts…