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Exercise 22 Understanding Wilcoxon Signed-Rank Test
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Exercise 22 Understanding Wilcoxon Signed-Rank Test
1. What are the mean and standard deviation (SD) for central-to-peripheral fat
ratio at baseline for the DMPA user group in the Dal’Ava et al. (2014) study?
What are the mean and standard deviation (SD) for central-to-peripheral fat
ratio at baseline for the TCu 380A IUD user group?
a. DMPA= 0.89 (0.17), IUD=0.88(0.13)
2. What criteria were used to match pairs of subjects from the DMPA and TCu
380A IUD groups? What were the study exclusion criteria?
a. Pairs were matched based on age (within 2 years) and weight
(within 2kg)
b. Exclusion criteria breastfeeding, DMPA within past 6 months, any
disease that affects body mass, use of corticosteroids, diuretics,
thyroid hormones, growth hormone therapy and eating disorders
3. According to the study narrative, at baseline there were no statistical
differences between the DMPA and TCu 380A IUD groups for what nine
variables?
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