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Class #9: Exploratory data analysis and vizualization (Introduction to dataset2)
Further reading (facultative):
E. Babbie, The Practice of Social Research, 12th edition, Wadsworth, Cengage Learning: 2010 (Chapter 14: Analyzing Quantitative Data)
E. Tufte, The Visual Display of Quantitative Information (2nd ed.), Cheshire, CT: Graphics Press: 2001