Harvard psychologist Stephen M. Kosslyn clearly makes this point in his book Graph Design for the Eye and Mind (Oxford University Press, 2006): “The strong suit of graphs is the illustration of the quantitative relations, and they are not appropriate if you only want to convey precise values. If this is your goal, use a table.” As Kosslyn points out, different data and goals require different visual formats: • Tables are often best when the goal is to have people remember specific numbers. • Graphs, such as bar charts, can be very useful for complex comparisons. • Line charts may be better for
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