# Analysis and Interpretation of Statistics

The following questions are based on a journal article by Tsay and Hung (2010). Please see the attached file for the full description and for the results of the study's data analysis needed to answer the questions.

Which group's test scores had the least amount of variability or dispersion? Provide a rationale for your answer.

Did the empowerment variable or self-care self-efficacy variable demonstrate the greatest amount of dispersion? Provide a rationale for your answer.

The mean ( ) is a measure of _____________ ______________ of a distribution while the SD is a measure of _______________________ of its scores. Both _____ and SD are _______________________ statistics.

What was the mean severity for renal disease for the research subjects? What was the dispersion or variability of the renal disease severity scores? Did the severity scores vary significantly between the control and the experimental groups? Is this important? Provide a rationale for your answer.

Which variable was least affected by the empowerment program? Provide a rationale for your answer.

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#### Solution Preview

Which group's test scores had the least amount of variability or dispersion? Provide a rationale for your answer.

The control group has the least amount of variability, since the standard deviations of the baseline and post test measures at the three levels are least for control group. The only exception is in the case of post-test scores at the empowerment level, in which the standard deviation is higher than that of experiment group.

Did the empowerment variable or ...

#### Solution Summary

The solution provides analysis and interpretation of the given descriptive statistics output for a clinical trial.