When to use the T-Test?

-  Standard deviation not known

-  Sample size <30


  • T-test assumes each population has a standard distribution

  • used to show how changes affect a small sample of a larger population.

  • useful with experiments and trying to determine the difference in two groups (i.e. using an EdTech tool to teach the same assignment to two different groups).

  • Paired and Unpaired t-tests. Paired tests for one subject and an unpaired for two groups.


Data Set