Testing Differences with the T-Test

Learning Outcomes

After completing this module you should be able to:

  • Explain how a t-test works and what it does
  • Compute a test statistic for a t-test
  • Draw conclusions about two sets of data based on the information gleaned from using a t-test.

Module contents


1: How to convince your boss
2: Looking at the data
3: Estimating averages
4: How do we measure variation? If you said standard deviation...
5: How accurate are our estimates?
6: Combining errors
7: Getting to t-calc
8: A general formula for t-calc
9: Degrees of freedom
10: The bottom line (finally)
11: Give it a try
12: Once more for luck
13: The big picture
14: Summary