ABSTRACT
In Chapters 4 and 6 we saw how to use the binomial and the Pearson’s χ2 tests to test hypotheses about the number of successes out of n independent trials. Quite often, however, researchers are interested in the proportion of successes (i.e., the number of successes divided by the number of trials). In this section, we will describe how to perform statistical tests on proportions of successes, and how to calculate, using sample data, confidence intervals that have a given probability of including the true population proportion.
