7.6 A Quick Review

Review of Key Terms

• Define each of the following:
  • Population Parameter
  • Null Hypothesis
  • Test Statistic
  • Null Distribution

Comparing Groups Review

Take a moment to recall the tests you learned this week. Here is a quick cheat-sheet to their key assumptions.

paired/unpaired	parametric	non-parametric
unpaired	unpaired t-test - metric var - i.i.d. - (not too un-)normal	Wilcoxon rank-sum ordinal var i.i.d.
paired	paired t-test metric var i.i.d. (not too un-)normal	Wilcoxon signed-rank metric var i.i.d. difference is symmetric sign test ordinal var i.i.d.