The t-tests are extensively used in statistics to test for population means. Typically, they are used instead of the corresponding z-tests when the the population standard deviations are not known.

Mathcracker.com provides t-test for one and two samples, and for independent and paired samples. Also, you will be able to find calculators of critical value as a well as calculator of probabilities and graphing regions of the t-distribution.

In this page you will all the T-tests we have available. Check the list below:

## T-test for Paired Samples

Instructions: This calculator conducts a t-test for two paired samples. This test applies when you have two samples ...

## T-test for two Means – Unknown Population Standard Deviations

Instructions: Use this T-Test Calculator for two Independent Means calculator to conduct a t-test for two population ...

## T-test for One Population Mean

Instructions: This calculator conducts a t-test for one population mean ((sigma)), with unknown population standard ...

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