You are a researcher who is interested in the impact of relaxation training on migraine headaches. You recruit a sample of 20 adults (half male, half female) who suffer from migraines and ask them to journal about the frequency and duration of their headaches. You measure this for 1 week to get a baseline (before training starts) and then introduce relaxation training for 2 weeks. The dependent variable is the duration (hours/week) of headaches in each of those 3 weeks. The data are below (/25): Subject Gender Week 2 Week 3 Week 4 1 F 22 8 6 2 F 19 10 4 3 F 15 5 4 4 F 30 13 12 5 F 27 13 8 6 7 8 9 FFFF 27 8 7 16 5 2 18 8 1 24 14 8 10 F 25 16 11 11 M 20 18 14 12 M 17 10 12 13 M 16 8 10 14 M 30 20 11 15 M 17 17 18 16 M 22 18 7 17 M 29 19 18 18 M 11 4 19 M 35 28 20 20 M 28 22 222 28 23