Multiple Choice Questions

Before completing the book’s Coder/Hacker chapter exercises, take this multiple-choice pre-test from the end of the chapter.

Next, visit the Coder and Hacker Chapter exercises page for more.

1: Which of the following is not an assumption for binary logistic regression?

  1. Normally distributed variables
  2. No multicollinearity
  3. Linearity
  4. Independence of observations

Ans: A

2: A significant odds ratio of 2.5 for BMI as a continuous predictor of heart disease in a binary logistic model would indicate which of the following?

  1. The odds of heart disease increase 2.5% for every 1-point increase in BMI.
  2. Those with heart disease have 2.5 times higher odds of having an increasing BMI compared to those without heart disease.
  3. The odds of heart disease are 2.5 times higher for every 1-point increase in BMI.
  4. There are 2.5 times as many people with heart disease as without among those with higher BMI.

Ans: C

3: A confidence interval indicates a significant odds ratio when

  1. it includes 1.
  2. it includes 0.
  3. it does not include 1.
  4. it does not include 0.

Ans: C

4: For a categorical predictor in a logistic regression model, what is the group that other groups are compared to called?

  1. Null group
  2. Independent group
  3. Standard group
  4. Reference group

Ans: D

5: Computing the percent correctly predicted by the model is one way to determine

  1. model fit.
  2. model significance.
  3. predictor significance.
  4. if assumptions are met.

Ans: A