Z-Test for Cross-Tabs

Abstract

If, as shown in the Chap. 35, multiple random samples from a binary data set have a normal frequency distribution, then t-tests, like the ones for continuous data (Chap. 7), should be OK for their analysis. Consequently, if we compare two binary samples, for example the outcomes of two treatment modalities, then a two sample t-test should be OK for statistical testing. The two sample t-test for binary outcomes is called the two sample z-test. This chapter shows how it works.