For the following data from a repeatedmeasures study, find the difference scores and compute the sample mean difference, the variance for the difference scores, and the standard error for the sample mean difference.
Given info:
The given data are shown below,
Participants  Treatment 1  Treatment 2 
A  5  8 
B  6  13 
C  7  10 
D  9  12 
Calculation:
The difference and
Participants  Treatment 1  Treatment 2 


A  5  8  3  9 
B  6  13  7  49 
C  7  10  3  9 
D  9  12  3  9 
TOTAL  16  76 
The value of
The value of
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