Chi-square Tests

  title={Chi-square Tests},
  author={Ton J. M. Cleophas and Aeilko H. Zwinderman},
Z-tests (Chap. 36) are OK for comparing the effects of two treatment modalities on numbers of responders to treatment, however, pretty laborious. Phi tests (Chap. 37) provide levels of association (or interaction) between a treatment modality and the number of responders, but no p-values. Often, we wish to know whether our result or the difference between two results are significantly different from zero. Chi-square tests make use of chi-square distributions (squared normal distributions), and… CONTINUE READING