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A study was conducted to compare the effects of two different interventions on p

ID: 3341166 • Letter: A

Question

A study was conducted to compare the effects of two different interventions on pain due to plantar fascitis; (a) 6-weeks stretching plus eccentric strengening exercise and (b) 6-weeks stretching only. 60 subects were assigned to treatment a or b using consecutive assignment. A Visual Analog Scale using a ruler was used to measure pain before and after the pain? intervention. Which statistic should be used to determine if there are differences between the two treatments in reducing Answers A-D A Mann Whitney U B paired t-test c unpaired t-test D Chi-square

Explanation / Answer

Answer (B) Paired t-test

Reason In a paired t-test, each subject or entity is measured twice, resulting in pairs of observation. This is used to test the difference between population means for a pair of random samples.

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