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Statistical Inference and Techniques -- Significance Testing Principles -- Significance Level

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View Resource **Java Applets for Power and Sample Size

This collection of free, interactive Java applets provides a graphical interface for studying the power of the most commonly encountered experimental designs. Intended to be useful in planning statistical studies, these applets cover confidence intervals for means or proportions, one and two sample hypothesis tests for means or proportions, linear regression, balanced ANOVA designs, and tests of...

http://www.stat.uiowa.edu/~rlenth/Power/
View Resource Cartoon: Meaningless Statistics

A cartoon that can be used in teaching about summary statistics. Cartoon by John Landers (www.landers.co.uk) based on an idea from Dennis Pearl (The Ohio State University). Free to use in the classroom and on course web sites.

http://www.causeweb.org/resources/fun/db.php?id=196
View Resource Cartoon: Normal versus Paranormal

A cartoon for use in teaching about the Normal distribution. The cartoon was drawn by Australian epidemiologist Matthew Freeman of the Public Health Information Development Unit at the University of Adelaide. It is free for use on course websites or in the classroom provided author acknowledgement is given (e.g. leave copyright statement on the image). Commercial uses should contact the...

http://www.causeweb.org/resources/fun/db.php?id=477
View Resource Cartoon: The Boyfriend

A cartoon suitable for a course website that makes use of a boxplot to display an outlier and also uses the term "statistically significant" in its punch line. The cartoon is number 539 from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license.

http://www.causeweb.org/resources/fun/db.php?id=263
View Resource For a 2x2 Table of Cross-Categorized Frequency Data: Version 1

For a table of frequency data cross-classified according to two categorical variables, X and Y, each of which has two levels or subcategories, this page will calculate the Phi coefficient of association; perform a chi-square test of association, if the sample size is not too small; and perform the Fisher exact probability test, if the sample size is not too large. For intermediate values of n,...

http://faculty.vassar.edu/lowry/tab2x2.html
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