kendall tau

Correlation is a widely used method that helps us explore how two variables change together, providing insight into whether a relationship exists between them. For example, imagine we want to understand if there is an association between time spent studying and exam scores. Or, maybe we think that people who eat more cookies are happier. Or, we want to see if people who live near a park hear more birds singing in the morning. Correlation is a valuable tool for understanding the extent to which variables are associated.