Statistics is the area of knowledge where appropriate methods for obtaining, representing and analyzing data are studied. This science, through analysis, transcends the merely descriptive aspect, as its striking feature is the ability to infer to the general from the results obtained in the examination of one of the parts. In practice, this translates into savings in time and material resources, with highly positive consequences in solving today's complex problems. The statistician provides mechanisms to diagnose and optimize the management and operation of several complex systems, allowing the estimation, through sophisticated techniques, of the variability of several quantities and their possible relationships.