PSYC 2002 Lecture Notes - Lecture 3: Dependent And Independent Variables, Central Tendency, Edward Tufte
Document Summary
Graphs: can have both positive and negative uses, accurately and succinctly present information, they can reveal hidden values that were initially hard to see, the most misleading graph published: Ithaca times: two variables in one graph. The other is cornell u"s ranking: the times where the two variables start are different, there is no axes, and no axes labels, over years, tuition does go up. The ranking, however, was actually going up as well. Jonathan keller fixed the graph to have them both have the same scale. Bar graph: used to display means in different conditions of an experiment, nominal: category names, pareto chart: the categories on the x axis are ordered from highest to lowest. In a bar graph, the bars are not touching one another: you can use bar graphs to highlight information, highlight the difference between means. Looks like a frequency polygon: a good way to display data.
