In: Statistics and Probability
Can you give me each step of this problem?
A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back pain. Prior to testing the patch, each of n = 8 patients rates the current level of back pain on a scale from 1 to 10. After wearing the patch for 90 minutes, a second pain rating is recorded. The data are as follows:
Before After
6 2
8 3
9 4
8 1
10 2
5 3
9 8
7 7