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1、3.1,Chapter Three,Art and Science ofGraphical Presentations,3.2,Graphical Excellence,Graphical Excellence is achieved whenlarge data sets are presented concisely and coherently.the message being presented by the chart is clear.the comparison of two or more variables is aided.the substance of the dat
2、a, not the form of the graph is prominent.there is no distortion of the data and findings.,3.3,Graphical Excellence,Edward Tufte of Yale describes graphical excellence asThe well-designed presentation of interesting data a matter of substance, of statistics, and of design.That which gives the viewer
3、 the greatest number of ideas in the shortest time with the least ink in the smallest space.Nearly always multivariate, andGraphical excellence requires telling the truth about the data.Note: Do you want it simple so everyone can understand it, or do you want it confusing so nobody can understand it
4、?,3.4,Figure 3.1,Graphical techniques should be used when there is a large amount of data,Does anyone really like this type of graph?,3.5,Figure 3.2,Here is pie chart that contains only 3 numbers,What would this look like if opinions were not split evenly?,3.6,Graphical Deception,Graphical technique
5、s create a visual impression, which is easy to distort, thereforeIt is more important than ever to be able to critically evaluate the graphically presented information. Be wary of graphs without a scale on one axis or without an axis labeled. Understand the information being presented: absolute valu
6、es? relative values (e.g. percentages or proportions)?Dallas Maverick players free throw “Percentage” Are the horizontal or vertical axes distorted in any way? UTA enrollment last 10 years,3.7,Oral Presentation,Again, here are some general guidelines for presenting your statistical findings to other
7、s in a presentation settingKnow your audience What kind of information they will be expecting? What is their level of statistical knowledge?Restrict your points to the main study objectives Dont go into the details of your analysisStay within time limits Respect your audienceUse graphs Use the graphical excellence ideas here to explain complex ideasProvide handouts.,
