1. You are interested in knowing whether there is a difference in mean depression score among people living with HIV whose viral load is suppressed versus those whose viral load is not suppressed. Dependent variable = CESDTot; independent variable = VLSup.
a. State the null hypothesis and research hypothesis (10 points)
b. Which type of statistical test would you use to answer this question (independent or pairwise comparison)? (5 points)
c. Run the appropriate data checks normality to determine which specific test you should use – explain which test you chose and why. (10 points)
d. Run the statistical tests (both parametric and non-parametric tests) chosen in part b and provide an interpretation of your findings using proper APA formatting for reporting statistical findings (e.g., What is mean and standard deviation (SD) of CESDTot for people living with HIV whose viral load is suppressed and those whose viral load is not suppressed? Is there a statistically significant difference in depression scores by viral load suppression? What is the effect size?) (25 points)
2. You are working on an intervention to reduce feelings of stigma among people living with HIV. You want to compare average stigma score before and after implementing the intervention. Baseline dependent variable = AttTot; follow-up dependent variable = AttFollow.
a. State the null hypothesis and research hypothesis (10 points)
b. Which type of statistical test would you use to answer this question (independent, or pairwise comparison)? (5 points)
c. Run the appropriate data checks normality to determine which specific test you should use – explain which test you chose and why. (10 points)
d. Run the statistical tests (both parametric and non-parametric tests) chosen in part b and provide an interpretation of your findings using proper APA formatting for reporting statistical findings (e.g., What is mean and SD of AttTol and AttFollow? Is the intervention associated with a change in mean stigma score? What is the effect size?). (25 points)