The Raw Data
Raw data is the expression used to describe the original data before any analysis is undertaken. It is not a very palatable phrase. Something like “original data” or “new data” would have been more inviting, but I have to stick to convention. The purpose of this chapter is to explain the different kinds of data and present a number of definitions to be used in the chapters that follow. In addition, I will demonstrate how figures can mislead or confuse even before the statistical analysis has started.