Chapter 3: Descriptive Statistics

• Florida 2000 voting data and documentation.
• Primary Biliary Cirrhosis data and documentation
• New York ozone data (.txt, .csv) and documentation

•  ColorBrewer.  Dr Cindy Brewer, of  Penn State University, has developed these color schemes for the Digital Government: Quality Graphics project.  They include very useful information on visibility for the color-blind, suitability for photocopying, for cheap color printers, and for digital projection.
  
• Vischeck has tools to evaluate images for visibility with red-green color-blindness, and to modify images to improve visibility.
• About.com has many articles on the use of color on screen and on paper.

• This applet shows the effect of varying the bin width in a histogram.