
158 Nonparametric Statistics for Social and Behavioral Sciences
Example 6.2 illustrates application of the sign test for related samples using
matched pairs. This example uses the data in Table6.3 that show the time it
takes for individuals to feel some relief from headache pain under two dif-
ferent therapy methods.
Example 6.2
A nurse practitioner wants to investigate whether patients get faster
relief from headaches with Therapy 1 or Therapy 2. She engages a
group of 40 patients with similar headache problems. The 40 patients
are matched to form 20 pairs based on the average durations of their
headaches. For example, two patients with the av ...