Boxers or briefs.
Republican or Democrat.
Yin or yang.
Why is it that life often seems to boil down to two choices?
Heck, it even happens when you open the Basic Stats menu in Minitab. You’ll see a choice between a 2-sample t-test and a paired t-test:
Which test should you choose? And what’s at stake?
Ask a statistician, and you might get this response: "Elementary, my dear Watson. Choose the 2-sample t-test to test the difference in two means: H0: µ1 – µ2 = 0 Choose the paired t-test to test the mean of pairwise differences H0: µd = 0."
You gaze at your two sets of data values, mystified. Do you...