This website, created by David Howell of the University of Vermont, discusses the nature of data missing from research testing and how to deal with it. It also analyzes a specific data set throughout the text and...
This applet, created by Kevin O'Bryant of the University of California - San Diego, illustrates the monoalphabetic substitution codebreaking process using a chi-squared process. The author explains how and why this...
This site, created by Michelle Lacey of Yale University, gives a definition and an example of categorical data. Topics include two-way tables, bar graphs, and segmented bar graphs. The author provides a nice...
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