5. What are two ways in which a ratio is different from a proportion? 6. From June to August, 1000 blood samples were collected among intensive care patients at BUMC. One hundred and twenty of them were positive for HIV. Complete A-D. A. Number of samples (n) = B. Positives (x) = C. x= D. Interpretation: 7. A sample of 100 healthy middle-aged women was followed for 9 years. All subjects entered the study on January 1, 2009, and all women were followed until December 31. 2017. None were lost to follow-up, and no one died during this period. During this period, five subjects were diagnosed with ovarian cancer, but all survived until the end of the study. None were cured. The time at which these subjects developed cancer is shown here: Subject 2009 2010 2011 2012 2013 2014 2015 2016 2017 1 cancer 2 cancer 3 cancer 4 cancer 5 cancer What is the prevalence of ovarian cancer on December 31, 2017? Show all work. Provide an interpretation