A T-Test is a statistical method used to determine if there is a significant difference between the means of two groups. It helps researchers understand whether any observed differences are likely due to chance or if they reflect a true effect. T-Tests are commonly used in various fields, including psychology, medicine, and social sciences. There are different types of T-Tests, such as the Independent Samples T-Test for comparing two separate groups and the Paired Samples T-Test for comparing two related groups. The results of a T-Test are often reported with a p-value, which indicates the probability that the observed differences occurred by random chance.