Click on the following links. Please note these will open in a new window.

• Hypothesis tests to compare means of two populations - paired samples 
  An explanation of hypothesis testing for matched or dependent samples. 
   
• Hypothesis tests to compare means of two populations - independent samples 
  A web page detailing the t-test for independent samples. 
   
• Two-Proportion-Z-Test 
  A video detailing how to calculate and interpret the independent t-test for proportions.   
   
• Tests with Two Independent Samples, Continuous Outcome 
  A website containing a discussion and examples of independent t-tests.