# Complex Samples Logistic Regression

The Complex Samples Logistic Regression procedure performs logistic regression analysis on a binary or multinomial dependent variable for samples drawn by complex sampling methods. Optionally, you can request analyses for a subpopulation.

**Example.** A loan officer has collected past records of customers
given loans at several different branches, according to a complex
design. While incorporating the sample design, the officer wants to
see if the probability with which a customer defaults is related to
age, employment history, and amount of credit debt.

**Statistics.** The procedure produces estimates, exponentiated
estimates, standard errors, confidence intervals, *t* tests,
design effects, and square roots of design effects for model parameters,
as well as the correlations and covariances between parameter estimates.
Pseudo *R* ^{2} statistics, classification tables, and
descriptive statistics for the dependent and independent variables
are also available.

Complex Samples Logistic Regression Data Considerations

**Data.** The dependent variable is categorical. Factors are
categorical. Covariates are quantitative variables that are related
to the dependent variable. Subpopulation variables can be string or
numeric but should be categorical.

**Assumptions. **The cases in the data file represent a sample
from a complex design that should be analyzed according to the specifications
in the file selected in the Complex Samples Plan dialog box.

Obtaining Complex Samples Logistic Regression

This feature requires the Complex Samples option.

- From the menus choose:
- Select a plan file. Optionally, select a custom joint probabilities file.
- Click Continue.
- In the Complex Samples Logistic Regression dialog box, select a dependent variable.

Optionally, you can:

- Select variables for factors and covariates, as appropriate for your data.
- Specify a variable to define a subpopulation. The analysis is performed only for the selected category of the subpopulation variable.

This procedure pastes CSLOGISTIC command syntax.