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Exercise 10 Description of a Study Sample
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Exercise 10 Description of a Study Sample
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Exercise 10: Description of a Study Sample1. What demographic variables were measured at the nominal level of measurement in the Oh
et al. (2014) study? Provide a rationale for your answer.
Bone mineral density (BMD) was a variable measure at the nominal level. The BMD of each
participant was measured then place into one of three groups: normal, osteopenia, and
osteoporosis.
2. What statistics were calculated to describe body mass index (BMI) in this study? Were
these appropriate? Provide a rationale for your answer.
The BMI in this study were described as a mean of 23.8 kg/m2 (SD = 3.2)
The description of BMI does not seem appropriate because of the vast age span of 51-83, as
well as, the variability in height and weight.
3. Were the distributions of scores for BMI similar for the intervention and control groups?
Provide a rationale for your answer.
Yes, the SD for the intervention group was 3.14 and the SD for the control group was
3.32
4. Was there a significant difference in BMI between the intervention and control groups?
Provide a rationale for your answer.
No. The difference in BMI between the intervention and control groups was 0.79.
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