Descriptive statistics

We describe a set of descriptive procedures and statistical measures to show how carry out an accurate statistical investigation. We detect two different types of approaches: graphical and numerical. The first approach contains information about the distribution of the data including tables, used to organize the collected information, and graphs, drawn to visualize the trend of the data. The second one consists of several statistical measures that give a summary of the data for the statistical units in a specific group. Finally, an example of clinical data is presented to provide an accurate understanding of the nature and relevance of descriptive statistical methods into the biomedical investigations.