Patient 1 6 Patient 2 4 Patient 3 2 Patient 4 6 Patient 5 5 Patient 6 3 Patient 7 7 Patient 8 5 Patient 9 4 Patient 10 2 Patient 11 6 Patient 12 4 Patient 13 7 Patient 14 3 Patient 15 5 Patient 16 7 Patient 17 6 Patient 18 5 Patient 19 3 Patient 20 4 Patient 21 6 Patient 22 7 Patient 23 5 Patient 24 7 Patient 25 6 Patient 26 2 Patient 27 5 Patient 28 1 Patient 29 5 Patient 30 4 Patient 31 7 what is the mean