demographic variables

1.Question

What demographic variables were measured at the nominal level of measurement in the Oh et al.(2014)study?

Answer:The demographic variabless measured at the nominal level include non-smoker,non-drinker,history of fracture,regular exercise and are considered nominal because can be describe by precentages, and mode.

2.Question

What statistic were calculated to describe body mass index(MBI) in this study?Were these appropiate?

Answer:Mean and standard deviation were the statistic used to calculated BMI.Because BMI is an interval-ratio variable,mean and stadard deviation are appropiate.

3.Question

Were the distributions of scores for BMI similar for the intervention and control groups?

Answer:The distribution of scores for BMI was similar for intervention and control groups because the mean and standard deviation were very similar.

4.Question

Was there a significant difference in BMI between the intervention and control groups?

Answer:There was not a significant difference in BMI between the intervention group and the control group.

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5.Question

Bssed on the sample size of N=41,what frequency and percentage of the sample smoked?What frequency and percentage of the sample were non-drinkers(alcohol)?Show your calculations and round to the nearest whole percent.

Answer:

Frequency of participants who smoked=0+0=0

Percentage of participants who smoked=0%

Frequency of participants who were non-drinkers=20+20=40

6.Question

What measurement method was used to measure the bone mineral density(BMD) for the study participants?Discuss the quality of this measurement method and document your response.

Answer:The bone mineral density (BMD) was measurement by ratio/interval level.The mean and standard deviation equal central location and dispersion gives us the shape of the graph.