# Descriptive Statistics: Demographic Variables

Descriptive Statistics: Demographic Variables ART 1 Thomas, P.E. (2011). Do racial disparities persist in infant mortality from respiratory distress syndrome? Journal of Obstetric, Gynecologic, & Neonatal Nursing, 40(1), 47-51. doi:10.1111/j.1552-6909.2010.01205.x Identify the (descriptive) demographic variables reported in the article, their level of measurement, and the statistical test(s) used to report their results using the table below. Demographic variable Level of measurement Descriptive statistic used [Example: hair color] [nominal] [Number/frequency, percentage] PART 2 Work Sheet on Statistics to Determine Differences A study is developed to determine if there is a difference in the average fasting blood glucose in participants randomized to a dietary intervention group or a group receiving an exercise intervention in addition to a dietary intervention. 1. What is the independent variable? 2. What is the dependent variable? 3. Are the two groups independent or dependent? 4. What statistical test should be used to measure the outcome variable? Why? 5. Write a null hypothesis for this study. 6. Write an alternative hypothesis for this study. 7. The researcher selects a t-test to analyze the data which produces a p value of .07. She had selected an alpha of .05 prior to data collection. What is your conclusion based on this result? 8. What type of error might the researcher be making? 9. Under what circumstances would a t-test be an inappropriate choice of statistical test for this study? 10. What if the researcher was only able to recruit 20 participants? What other statistical test(s) should be considered to compare the differences in the outcome variable? Why?]]>