UnBiased Data

A PhD student collects some data about patients’ weight from a hospital database. Some of the patients were given an experimental drug, and the rest were not given any medication. The student wants to know whether the experimental drug has a causal effect on patients’ weight, however, how the hospital... [Read More]

People often want to know if an event causes something to happen. For instance, you might want to know if undergoing surgery will cause you to live a longer life. This is typically referred to as a causal effect because an event (surgery) causes something to happen (you live a... [Read More]