“Critical Values of the Chi-Square Distribution” chi-squared test NIST/SEMATECH e-Handbook of Statistical Methods NIST/SEMATECH e-Handbook of Statistical Methods the distribution chi-square table NIST/SEMATECH e-Handbook of Statistical Methods http://itl.nist.gov/div898/handbook/eda/section3/eda3674.htm Chi-squared degrees of freedom table “Critical Values of the Chi-Square Distribution” chi-square table