http://websterfw.com/published/davismcgivney_pw_test/davis-mcgivney chapter 3_pw_1.html Introduction
http://websterfw.com/published/davismcgivney_pw_test/davis-mcgivney chapter 3_pw_2.html
3.1 Graphical Data Descriptions
http://websterfw.com/published/davismcgivney_pw_test/davis-mcgivney chapter 3_pw_3.html
3.2 Numerical Data Descriptions: Mean and Standard Deviation
http://websterfw.com/published/davismcgivney_pw_test/davis-mcgivney chapter 3_pw_4.html
3.3 Quantitative Data Descriptions: Median and Quartiles
http://websterfw.com/published/davismcgivney_pw_test/davis-mcgivney chapter 3_pw_5.html Chapter 3 Summary