Introduction to Complex Samples Procedures

An inherent assumption of analytical procedures in traditional software packages is that the observations in a data file represent a simple random sample from the population of interest. This assumption is untenable for an increasing number of companies and researchers who find it both cost-effective and convenient to obtain samples in a more structured way.

The Complex Samples option allows you to select a sample according to a complex design and incorporate the design specifications into the data analysis, thus ensuring that your results are valid.