In an experiment examining the effects Tai Chi on arthritis pain, Callahan (2010

Question

In an experiment examining the effects Tai Chi on arthritis pain, Callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. Half of the participants immediately began a Tai Chi course and the other half (the control group) waited 8 weeks before beginning. At the end of 8 weeks, the individuals who had experienced Tai Chi had less arthritis pain that those who had not participated in the course. The independent variable is: Duration of the Tai Chi course The amount of arthritis pain experienced Taking the Tai Chi course versus not taking the course The number of individuals with doctor-diagnosed arthritis What scale of measurement is used for the independent variable? Interval Ratio Ordinal Nominal The dependent variable is: The amount of arthritis pain experienced Duration of the Tai Chi course The number of individuals with doctor-diagnosed arthritis Taking the Tai Chi course versus not taking the course What scale of measurement is used for the dependent variable? Ordinal Interval or Ratio Interval Ordinal or Ratio

Explanation / Answer

1) independent variable: TAKING the tai chi course verses not taking the course

2) scale of measurement : nominal

3) amount of arthritis pain experienced

4)ordinal or ratio

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