## Multiple choice questions

**Logistic regression is used when you want to:**

__Answer choices__

- Predict a dichotomous variable from continuous or dichotomous variables.
- Predict a continuous variable from dichotomous variables.
- Predict any categorical variable from several other categorical variables.
- Predict a continuous variable from dichotomous or continuous variables.

#### Answer: Predict a dichotomous variable from continuous or dichotomous variables

**The odds ratio is:**

__Answer choices__

- The ratio of the probability of an event not happening to the probability of the event happening.
- The probability of an event occurring.
- The ratio of the odds after a unit change in the predictor to the original odds.
- The ratio of the probability of an event happening to the probability of the event not happening.

#### Answer: The ratio of the odds after a unit change in the predictor to the original odds

**Large values of the log-likelihood statistic indicate:**

__Answer choices__

- That there are a greater number of explained vs. unexplained observations.
- That the statistical model fits the data well.
- That as the predictor variable increases, the likelihood of the outcome occurring decreases.
- That the statistical model is a poor fit of the data.

#### Answer: That the statistical model is a poor fit of the data

**Logistic regression assumes a: **

__Answer choices__

- Linear relationship between continuous predictor variables and the outcome variable.
- Linear relationship between continuous predictor variables and the logit of the outcome variable.
- Linear relationship between continuous predictor variables.
- Linear relationship between observations.

#### Answer: Linear relationship between continuous predictor variables and the logit of the outcome variable

**In binary logistic regression:**

__Answer choices__

- The dependent variable is continuous.
- The dependent variable is divided into two equal subcategories.
- The dependent variable consists of two categories.
- There is no dependent variable.

#### Answer: The dependent variable consists of two categories