This guide to statistics is not designed to make you a statistician, but rather to give you some basic tools with which to make better decisions as an HRD practitioner.
Statistics can be very complex, but it can also be simple and straightforward.
I prefer the latter, so let's get started. As you work your way through the following material you may find it helpful to visit the Virtual Statistics Lab at Rice University. There are four levels of measurement. The nominal level is simplest, while Ratio mesures are the most sophisticated. Any data that you may have can be grouped or categorized in some way.