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You examine the effectiveness of manual therapy technique on pain-free range of ...

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You examine the effectiveness of manual therapy technique on pain-free range of motion (ROM) and compare it to ultrasound (n=20 for both groups). The mean (SD) post-treatment ROM was 65 (10) degrees in the intervention group and  50 (10) in the ultrasound group.

Calculate a Cohen's d effect size (one decimal place).

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