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.

Learn how to calculate t-scores. Study the t-score formula, discover examples of how to use the t-score equation, and identify applications of t-scores.

Understand more about T lymphocytes and their various types. Learn about apoptosis, how T cells work, and discuss the production and maturation of...

Learn to define what a t-test is. Discover the two-sample t-test and the unpaired t-test. Learn when to use a t-chart and how to find the t-value. See examples.

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t = Time. The amount of time over which the interest is calculated, in years. The interest rate will often be presented as a percentage, but in the formula, it is a decimal.

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The difference between a t -test and a z -test hinges on the differences in their respective distributions. As mentioned, a z-test uses the Standard Normal Distribution, which is defined as having ...

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 ...

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