Pearson Chi-Square
From OPOSSEM
Revision as of 06:37, 7 July 2011 by Chris Lawrence (talk | contribs)
Revision as of 06:37, 7 July 2011 by Chris Lawrence (talk | contribs)
<math>\chi^2_{\text{ob}} = \sum_{ij} \frac {(f_{ij}-e_{ij})^2}{e_{ij}}</math>, where <math>e_{ij}= \frac {\text{(row i total)(column j total)}}{n}</math>