T-tests

A t-test is a statistical tool used to compare the averages of two groups to see if they are significantly different. For example, it can help determine whether a new teaching method results in higher test scores compared to a traditional approach. It considers the difference between the group averages, the variability within each group, and the size of the groups. If the test shows a significant difference, it suggests the observed difference is unlikely due to random chance alone. T-tests are commonly used in research to evaluate the effectiveness of interventions or differences between groups.