Using the data from Week 2 and Week 3 of Exercise 18.1, run a matched-sample t test to test the hypothesis that migraines decreased from before to after relaxation therapy.

Exercise 18.1

Migraine headaches are a problem for many people, and one way of treating them involves relaxation therapy. A study of the effectiveness of relaxation techniques in the treatment of migraines was conducted by Blanchard, Theobald, Williamson, Silver, and Brown (1978). The data that follow are in agreement with those found by Blanchard et al. (Their study was more complex than the one examined here.) I have calculated  to save you work.

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