A convenience sample of 133 Intensive Care Unit (ICU) patients were asked whether or not they had an advance directive upon being admitted to the ICU (yes/no). We were interested in comparing results for Caucasian patients and African American respondents. Our main question of interest was: is there an association between advance directive and ethnicity? For all questions below, assume 2-tailed test and alpha= .05.
Interpret the X2. Report in APA format, include the effect size if appropriate (Phi), and write a brief interpretation statement.
Compute the CI around the difference in proportion using the website