The premise of this problem is that you are looking at a group of patients with

Question

The premise of this problem is that you are looking at a group of patients with heart failure. Patients either have ischemic cardiomyopathy (ICM) or non-ischemic cardiomyopathy (NICM). You have gathered information about their smoking history. You are wondering if there is a relationship between these 2 variables (i.e. type of heart disease and history of tobacco use). (Ischemic cardiomyopathy is a result of plaque buildup in vessels.) 1. What type of variables do you have? Numerical or Categorical (complete calculations for both A & B)? A. Type of heart disease is a __________________ variable. B. History of tobacco use is a ___________________ variable.

#2. Which variable is independent (select the correct answer)? (A.) History of Tobacco Use (B)). History of heart disease

#3. If you were to test the relationship between the 2 variables, which inferential statistical test would you use (select the correct answer)?

(A). t-test    ( B). Simple linear regression (C). Chi-Square test

#4. What would your alternative hypothesis (H1) state (select the correct answer)?

A. Type of heart disease is independent of history of tobacco use.

B. Type of heart disease is dependent on history of tobacco use.

Explanation / Answer

1. Type of variable is categorical.

A. Type of heart disease is a categorical

B. History of tobacoo use is a categorical

2. A. History of Tobacco use is independent variable.

3. We will use b. Simple linear regression.

4. Type of heart disease is dependent on history of tobacco use would be alternative hypothesis.

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