ABSTRACT
This chapter considers graphics primarily from the story-telling angle; graphics that help check model assumption. A concise description is given by E. R. Tufte: Data graphics visually display measured quantities by means of the combined use of points, lines, a coordinate system, numbers, symbols, words, shading and color. The use of charts and graphs saves time since the essential meaning of large measures of statistical data can be visualized at a glance. Trellis graphics is a potentially very exciting and powerful tool for the exploration of data from behavioral studies. In general, graphical displays of the kind described in previous sections are extremely useful in the examination of data; indeed, they are almost essential both in the initial phase of data exploration and in the interpretation of results from more formal statistical procedures. Boxplots are more useful than histograms for displaying most data sets and are very useful for comparing groups.
