Business Survival Analysis Using SAS

Chapter 3: Stratified Sampling Method for Survival Analysis

Introduction

The Sampling Process with PROC SURVEYSELECT

Step 1: Analyze Sample Proportion for Strata

Step 2: Create the Model_Shopping Sample

Step 3: Create the Score_Shopping Sample

Step 4: Compare the Results from the Model_Shopping and Score_Shopping Data Sets

SAS Enterprise Miner Nodes

The Sample Node

The Data Partition Node

The Flowchart

Introduction

This chapter demonstrates how to create a stratified sample for a survival analysis model. Stratifying the database—and sampling from all strata at the same rate of a categorical or binary distribution—ensures that the stratum proportions in the sample (model, training, validation, test, and scoring data sets) match the stratum proportions ...