Yule's Q

Yule's Q is a statistic used to measure the strength and direction of the association between two binary variables, such as yes/no or true/false responses. It ranges from -1 to +1, where +1 indicates a perfect positive association (both variables tend to be present together), -1 indicates a perfect negative association (the presence of one means the absence of the other), and 0 suggests no association. Yule's Q is calculated using a specific formula involving the counts of joint and separate occurrences, providing a clear indicator of how strongly two factors are related.