2. Compute the mean for the difference scores.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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22

For #20 - 29: A researcher would like to evaluate the effectiveness of a pain-relief patch designed for back pain.
Prior to testing the patch, each of the patients (n = 7) rated their 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 in this repeated-measures design
are as follows:
Pain
Pain
D scores
D2
SS
variance of D= s²
df
Before
After
7
2
3
4
MD
SMD
=
п
4
п
5
2
t = Mp / SMR.
3
4
2
5
1
|
22. Compute the mean for the difference scores.
Transcribed Image Text:For #20 - 29: A researcher would like to evaluate the effectiveness of a pain-relief patch designed for back pain. Prior to testing the patch, each of the patients (n = 7) rated their 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 in this repeated-measures design are as follows: Pain Pain D scores D2 SS variance of D= s² df Before After 7 2 3 4 MD SMD = п 4 п 5 2 t = Mp / SMR. 3 4 2 5 1 | 22. Compute the mean for the difference scores.
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