12. Calculate the sums of squares for the difference scores from the repeated measures study below. Eight people were measured twice. Subtract it T2 - T1 (this way an increase will be a positive score, a decrease will be a negative score). Be careful of positive and negative values when you are calculating differences and adding them to get the sum of differences, then the mean difference. Hint: there is only 1 SS to calculate and it comes from D = T2 - T1. You can use either method to get the SS.
Baseline T1 Test T2
18 12
18 13
7 15
12 9
22 29
5 8
17 20
22 31
PLEASE DO THE WORK BY HAND!