Statistics Exercise 16

Class: _Statistics____________Date:
□ EXERCISE 16 Questions to be Graded
1. The researchers analyzed the data they collected as though it were at what level of measurement? d. Experimental
2. What was the mean posttest empowerment score for the control group? The mean posttest empowerment score was 97.12
3. Compare the mean baseline and posttest depression scores of the experimental group. Was this an expected finding? Provide a rationale for your answer.
The mean baseline depression score of the experimental group is 14.00.
The mean posttest depression score of the experimental group is 13.36.
The posttest score is 0.64 lower than the baseline score. This is an expected finding because after the completion of the empowerment program the experimental group’s depression showed improvement.
4. Compare the mean baseline and posttest depression scores of the control group. Do these scores strengthen or weaken the validity of the research results? Provide a rationale for your answer. The mean baseline depression score of the control group is 10.40 The mean posttest depression score of the control group is 10.40.
The scores show no change in the control groups score. It does show a change in the empowerments score which shows a decrease in the depression scores for the experimental group. 5. Which group's test scores had the least amount of variability or dispersion? Provide a rationale for your answer. The control groups test scores 10.40 both at baseline and posttest showed the least amount of variability or dispersion.

6. Did the empowerment variable or self-care self-efficacy variable demonstrate the greatest amount of dispersion? Provide a rationale for your answer.
I think the self care efficacy group showed the greatest amount of dispersion. The total groups post test score is 1.78 lower than the baseline score. The empowerment variable total groups posttest is only .11 lower than the baseline group.
7. The mean ( ) is a measure of central tendency of a distribution while the SD is a measure of dispersion of its scores. Both and SD are descriptive statistics.

8. 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. The mean severity for renal disease for the research subjects was 6.74. The dispersion or variability of the renal disease severity score was 2.97. The severity scores did not vary much between the control and the experimental groups. This is important as the groups were no differences in clinical and demographic characteristics.

9. Which variable was least affected by the empowerment program? Provide a rationale for your answer. The mean depression score showed the least amount of change when compared to their baseline values. Only 0.66 points for depression compared to 6.44 points for self care/self efficacy and 6.64 for empowerment. The mean score for the depression scale was lower than for the empowerment and self-care self-efficacy scales.

10. Was it important for the researchers to include the total means and SDs for the study variables in Table 2 to promote the readers’ understanding of the study results? Provide a rationale for your answer. No, it is not necessary for the reader to have the total means and the SD’s for the study variables in the table to understand the study results. One can understand the results showing only the total means.