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To Evaluate the Effect of the Treatment in a Pretest,posttest

Question 49

Multiple Choice

To evaluate the effect of the treatment in a pretest,posttest control group design,_____ is calculated.

A) (O2-O1) - (O4-O3)
B) O1-O3
C) O4-O3
D) O2-O3
E) O4-O2

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