For example, in a 2-sample t-test, N - 2 is used because there are two parameters to estimate. In statistics, degrees of freedom define the shape of the t-distribution used in t-tests when ...

In an unpaired t-test, the variance between groups is assumed to be equal. In a paired t-test, the variance is not assumed to be equal. Nicole is a freelance writer specializing in biology, health and ...

The t-test assists in hypothesis testing in statistics and uses the t-statistic, the t-distribution values, and the degrees of freedom to determine statistical significance. A t-test can shed ...

This article will explain when it is appropriate to use a paired t-test versus an unpaired t-test, as well as the hypothesis ... Before beginning her career as a writer, Nicole received her ...