Learn how representative samples and random samples differ and why combining them minimizes sampling bias for accurate data.

Techniques for using electoral registers to provide a sampling frame for the general population are already well established. The best known is that used on the National Readership Survey and most ...

Using the technique of probability sampling makes it easier to determine if the sample is actually representative of the population. Our goal is random sampling. In other words, we would like to ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...