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  • Explanatory Style and Athletic Performance

    As described in the web page itself: "This document was prepared as an illustration of the use of both t tests and correlation/regression analysis in drawing conclusions from data in an actual study." The study compares athletic performance of swimmers that are optimists vs. pessimists.

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  • One-way Anova of PTSD Data

    This page was written as instructions for a SAS lab assignment, but the example can be used with other programs. The study compares three treatments for rape victims against each other and a control group to see which treatment is most effective at reducing Post Traumatic Stress Disorder symptoms.

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  • Sexual Activity

    This page provides survey data on the sexual activity of male and female subjects and discusses choosing appropriate statistics to describe the data as well as reporting bias. It also links to a Chance article about the same study.

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  • Data Collection+Applets: Fundamental Statistics for the Behavioral Sciences

    This website provides data files, examples, guides that are referenced in David Howell's textbook published in 2013. There is also a student manual and links to other useful websites.

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  • How Random is Random?

    This site is a tutorial that takes students through a mayoral election process while discussing the concept of randomness. Topics include margin of error and confidence levels.

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  • Dataset: Rock Fries Your Brains

    This exercise uses descriptive statistics to analyze a data set about how rats respond to rock music vs. classical music.

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  • The Statistics of Hiring

    This short article discusses how the comparative ratios of the tails of normal distributions can result in bias in hiring practices. It contains a link to an applet that shows the comparative tail probability ratios.

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  • Can a difference be important if it is not significant?

    This short article discusses the difference between "important" and "statistically significant." The data used come from a study comparing male faculty salaries to female faculty salaries.

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  • Multiple Comparisons

    This exercise includes a discussion on comparing data with very different sample sizes and nonhomogeneity of variance. The data comes from a study on the behavior of pregnant women with regard to cigarette smoking.

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  • Bootstrapping

    This lesson describes bootstrapping in the context of a statistics class for psychology students.

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