ABSTRACT
Data can then be used to establish some understanding about the relations among the different variables. After collecting the data, it is necessary to utilize techniques for describing, treating, and analyzing them. This chapter aims to introduce some of the techniques that are commonly used in engineering to describe and summarizes data. Graphical analyses are widely used in engineering for both making initial assessments of data characteristics and presenting results to be used by engineers. The dimensionality is a measure of the number of axes needed to graphically present the data. Graphical analyses are usually limited to use with one-, two-, and three-dimensional data. The dimensionality of data was defined as the number of axes needed to represent the data. Tabular data with one value per classification are an example of one-dimensional data. Pie charts are commonly used to graphically present data recorded as fractions, percentages, or proportions.
