assignment1solutions.pdf - Assignment 1 Solutions Include all answers to homework questions in one document and submit it online under Assignment 1

assignment1solutions.pdf - Assignment 1 Solutions Include...

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Assignment 1 Solutions Include all answers to homework questions in one document and submit it online under Assignment 1. Textbook Homework Questions From the OpenIntro textbook (Diez, Barr, and Çetinkaya-Rundel 2015), do the following questions: 1.2, 1.4, 1.8, 1.12, 1.18, 1.20, 1.26, 1.30, 1.36 . In addition, answer the questions below. 1.2 Sinusitis and antibiotics a) 66 / 85 = 78% of patients in the treatment group experienced a significant improvement. 65 / 81 = 79% of patients in the control group experienced a significant improvement. b) The placebo seems to be more effective based on exact numbers, but they seem to be equal. c) No, the evidence doesn’t suggest that there is a difference in improvement rates. It seems to be due to chance. 1.4 Buteyko method, study components a) The cases are the 600 asthma patients. b) Quality of life, activity, asthma symptoms, and medication reduction, which are all ordinal categorical variables. Whether the patient used the Buteyko method or did not (nominal categorical variable) c) Whether asthma patients using the Buteyko method experienced a significant reduction in asthma symptoms and and improvement in quality of life compared to patients who did not. 1.8 Smoking habits of UK residents a) A UK resident b) 1691 c) sex - categorical, age - discrete numerical, marital - categorical, grossIncome - ordinal categorical, smoke - categorical, amtWeekends - ordinal categorical, amtWeekdays - ordinal categorical 1.12 Stealers, scope of inference a) All UC Berkeley undergraduate students is the population. The 129 in this are the sample.
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  • Spring '17
  • E-mail, Causality

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