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HW4exno1 - Homework Assignment 4 example Article Testing...

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Homework Assignment 4 example Article: Testing: with decaf, lose the jitters, but gain the gunk? Nov 29th, 2005 Source: msnbc health: New York Times NOTE: you cannot use this article for the homework assignment I. Goal: To determine whether drinking decaffeinated coffee increases (bad) cholesterol levels II. Model being tested: Model 1: Decaf coffee increases cholesterol levels Model 2: Decaf coffee does not increase cholesterol levels III. Design Features: 1. Experiment: a) what done: participants were assigned to drink different amounts of decaf coffee or no coffee b) for what purpose: to determine the effects of decaf on cholesterol levels (you can answer this all in 1 simple sentence, just address both parts a and b) 2. Controls: a) was the experiment controlled? Yes b) Treatment group = people who drank decaf coffee Control group = people who drank no coffee A. Explicit protocol 1. relevant: yes 2. status: present 3. quotes: “volunteers assigned at random to three groups. 59 drank no
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