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 leg 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. Use a two tailed test with a -.05 Confidence Interval 85%. The data are as follows Before After 6 2 10 DO a. Compute and record MD. b. Compute and record the estimated standard error for the mean difference c. Compute and record the Computed T