statistic/Homework-chi-square

  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. 

  1. Interpret the X2. Report in APA format, include the effect size if appropriate (Phi), and write a brief interpretation statement.
  2. Compute the CI around the difference in proportion using the  website 

http://vassarstats.net/

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