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A study by the University of Texas Southwestern Medical Center examined

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4) (4 points) A study by the University of Texas Southwestern Medical Center examined 626 people to see if a increased risk of contracting Hepatitis C was associated with having a tattoo. If the subject had a tattoo, researchers asked whether it had been done in a commercial tattoo parlor or elsewhere. Write a brief description of the association between tattooing and Hepatitis C, including an appropriate graphical display.

 Tattoo Done in Tattoo Done Commercial Parlor Elsewhere No Tattoo Has Hepatitis C 17 8 18 No Hepatitis C 35 495 53

 5) (3 points) Below is a contingency table summarizing the results of a survey done at a local college where students were asked their political leanings and sex. Create a chart and summarize the results of the survey. Is there an association between sex and political leanings, or are they independent?

 Sex Political Leanings Liberal Moderate Conservative Total Female 35 36 6 77 Male 50 44 21 Total 85 80 27 192 115

6) (3 points) A question was posed to a researcher - is there a relationship between gender and handedness? In an attempt to answer this question, the researcher went to Target and observed customers at the checkout. The researcher noted the gender as well as what hand they used to sign after using their credit card for 100 customers. The results are given below. Are the variables in question independent? Is there a relationship between gender and handedness? Create a chart to corroborate your findings.

Handedness Right Total 43 52 Female Total 87 Mal Gender Left 9 4 13 48 100 hehind out

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[Solved] A study by the University of Texas Southwestern Medical Center examined

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