To Assess the Equivalence of the Groups in a Pretest,posttest

question 13

Multiple Choice

To assess the equivalence of the groups 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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