http://digfir-published.macmillanusa.com/stats_tutorial/bps6e_tutorial_1204b.html
Chapter
1. Tutorial 1.2: Creating and interpreting bar charts and pie charts
51fd0304757a2edb47000006
http://digfir-published.macmillanusa.com/stats_tutorial/bps6e_tutorial_1204b_dlap.xmlDLAP questions51fd0304757a2edb47000006