In the first lesson, you'll start off by investigating DMAIC, the most popular acronym within the Six Sigma body of knowledge. It stands for define, measure, analyze, improve, and control. Then, to set the stage for the remaining lessons, you'll explore basic statistics. Since many of the Six Sigma methods and tools that will be discussed require that you have a basic knowledge of statistics, you'll need to be well-prepared. The lesson will show you how to apply the measures of location—median, mode, mean—and the measures of dispersion—range, mean absolute deviation (MAD), variance, and standard deviation (SD).