QUIZ 5_OCTOBER 28

# To compare the numbers youd have to use percentages

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using and only 177 no always using. To compare the numbers, you’d have to use  percentages (meaning 9/299, which is about 3.01%, compared to 20/177, which is about  11.2%). 2. Consider the second table (the table of percentages).  Explain how the number 0.03  was computed in this table? (3 pts)

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The person who found this number took the number of people found to always use a  condom (9) divided by the total number of people in the study (299), thus getting .03  or 3%. I have computed the following relative risk.  Explain what this number is telling us using non- technical language. (4 pts) Relative risk is the found by dividing the two percentages of data that you are  investigating/comparing. For this particular study, the statistician took the percentage of  people who got HIV but doesn’t always use a condom divided by the percentage of people  who got HIV who always use a condom. 3. Clearly indicate what relative risk is measuring on the graph below. That is, give the  visual representation of 3.77 on this graph?  (3 pts) 4. Give the appropriate shading for the left column (i.e. Condom Use=Always column)  for Relative Risk =1.0 and 1.5, respectively. (3 pts each)   Relative Risk = 1.0 Relative Risk = 1.5 2
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