# Essay Exercise 16

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Exercise 16: Mean and Standard Deviation 1. The researchers analyzed the data they collected as though it were at what level of measurement? a. Nominal b. Ordinal c. Interval/ratio d. Experimental C. The researchers analyzed the data as though it were at the interval/ratio level since they calculated means (the measure of central tendency that is appropriate only for interval/ratio level data) and standard deviations (the measure of dispersion for interval/ratio data) to describe their study variables. 2. What was the mean posttest empowerment scores for the control group? According to Table 2 the mean for the posttest empowerment scores is 97.12. 3. Compare the mean baseline and posttest depression scores of the experimental…show more content…
Their depression baseline (SD=10.34) and posttest (SD=10.34) had no changes. 6. Did the empowerment Variable or self-care self-efficacy variable demonstrate the greatest amount of dispersion? Provide a rationale for your answer. The self-care self-efficacy SD was higher than the empowerment group. The higher the SD the greater the dispersion. 7. The mean (x) is a measure of _central__________ __tendency___________ of a distribution while the SD is a measure of __dispersion___________ of its scores. Both x 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 rationale for your answer. What was the mean severity for renal disease for the research subjects? Moderately severe, mean=6.74. What was the dispersion or variability of the renal disease severity scores? SD=2.97 Did the severity scores vary significantly between the control and the experimental groups? No. Is this important? Yes because this shows that the experimental variable did not make that much of a difference in the experimental group vs the control group. 9. Which variable was least affected by the empowerment program? Provide a rationale for your