Determining When to Use a z-Distribution or a t-Distribution Learn how to determine when to use a z-Distribution or a t-Distribution, and see examples that walk through sample problems step-by-step for you to improve your statistics knowledge and skills
t-Test | Definition, Formula Calculation - Lesson | Study. com The t-score formula for an independent t-test is: t equals the mean of population 1 minus the mean of population 2 divided by the product of the pooled standard deviation and the square root of