Mathematics
Mathematics
Problem
# OPENING PROBLEM Nick believes he has devised a series of stretches which can help relieve back pain. He invites people with back pain to perform the stretches for several weeks. The participants rate their level of back pain on a scale of 1 to 10 (10 being the greatest) before and after the experiment:| <i>Before:</i> | 7 | 9 | 5 | 6 | 9 | 7 | 10 | 6 | 8 | 9 |
| 8 | 7 | 9 | 8 | 10 | 4 | 8 | 6 | 7 | 8 | |
| <i>After:</i> | 4 | 7 | 6 | 3 | 8 | 5 | 9 | 4 | 5 | 8 |
| 7 | 6 | 5 | 4 | 7 | 2 | 5 | 3 | 4 | 6 |