I tried what I could, please help I tried what I could, please help

I tried what I could, please help
I tried what I could, please help


Homework #4: Testing Differences Between Groups Use the data file HIV_Stigma_and_Depression.sav to run the following analyses and answer the associated questions. Save your file as: HW#4_name.sav. (where name is your last name). Submit your Homework via Canvas with any output files. 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) Null hypothesis- There is no different between mean depression score among people living with HIV whose viral load is suppressed versus those whose viral load is not suppressed Research hypothesis- There is significant difference in outcome in mean depression score among people living with HIV whose viral load is suppressed versus those whose viral load is not suppressed b. Which type of statistical test would you use to answer this question (independent or pairwise comparison)? (5 points) The type of statistical test I would use to answer this question is an independent test because I am comparing two groups: people living with HIV whose viral load is suppressed and people living with HIV whose viral load is not suppressed c. Run the appropriate data checks normality to determine which specific test you should use – explain which test you chose and why. (10 points) I should use an independent t-test because there are two group being compared: people living with HIV whose viral load is suppressed and people living with HIV whose viral load is not suppressed. The dependent variable (CESDTot) is continuous while the independent variable (VLSup) is dichotomous. The dependent variable is normally distributed which means it should be a parametric independent t-test. The skewness and kurtosis are normal and the sample size is large. 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) Null hypothesis- There is no difference between the average stigma score before and after implementing the intervention to reduce feelings of stigma among people living with HIV Research hypothesis- There is a significant difference between the average stigma score before and after implementing the intervention to reduce feelings of stigma among people living with HIV b. Which type of statistical test would you use to answer this question (independent, or pairwise comparison)? (5 points) The type of statistical test I would use to answer this question is a pairwise comparison test. c. Run the appropriate data checks normality to determine which specific test you should use – explain which test you chose and why. (10 points) I chose a pairwise comparison statistical test because I am comparing the same groups at different points in a time. I am comparing the same group of people living with HIV but before implementing the interventions to reduce feelings of stigma and then after implementing the intervention to reduce feelings of stigma. 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)