Lecture 3 - Inference for Two-Way Tables Using Categorical...

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Inference for Two-Way Tables Using Categorical Data
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Plan for the week MW: Lecture, Chapter 9 Friday: homework help with Ting Ting Assignment 1 due today at 10pm Assignment 2 due 2/1 at 10pm Copy of book on reserve in business library
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Hepatitis and Tattoos Does having a tattoo increase one’s risk of Hepatitis C?
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Data
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Yes or No Do students with tattoos have a higher risk of contracting Hepatitis C?
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Data Tattoo No Tattoo Total Hepatitis C 25 22 47 No Hepatitis C 88 491 579 Total 113 513 626
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Hypothesis H 0 : Risk of Hepatitis C is no different for those with and without tattoos H A : Risk of Hepatitis C is different across two groups
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Hypothesis H 0 : P tattoo = P no tattoo H A : P tattoo ≠ P no tattoo P = proportion that have hepatitis C
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What’s the idea? Hepatitis C No Hepatitis C Tattoo
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What’s the idea? Is the percentage of students with tattoos in the Hep C group the same as the percentage in the non-Hep C group?
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Is the percentage of Hepatitis C in the
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This note was uploaded on 03/29/2008 for the course BUSINESS 06E:071 taught by Professor Bethingram during the Spring '08 term at University of Iowa.

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Lecture 3 - Inference for Two-Way Tables Using Categorical...

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