Brief articles outlining basic concepts associated with statistics. Topics include an overview, graphic displays, numerical measures, probability, sampling, principles of testing, univariate inferential tests, and bivariate relationships.
Choosing a Statistical Test
Provides a table outlining statistical tests based on your type of data and study goal.
Fully downloadable PDF text from Graphpad Software, Inc. Although it is written as a companion to online software, it is a helpful general resource for understanding basic statistical principles, outlining when (and how) to use specific statistical tests based on your data, and interpreting statistical results.
Used to be StatNotes from North Carolina State University. A resource for basic and advanced quantitative and qualitative data analysis methods. Includes an overview for when to use specific analyses, key concepts and terms, assumptions, frequently asked questions, and even visual guides for using tests in SPSS and interpreting the outputs.
The Electronic Statistics Textbook
From Statsoft, Inc. Contains an overview of elementary concepts and continues with a more in depth exploration of specific areas of statistics, organized by modules representing classes of analytic techniques. A glossary of statistical terms and a list of references for further study are included.
Links to online statistics books, tutorials, downloadable software, and related resources.
Tools and Resources for Analyzing Data
GraphPad Quick Calculations
For computing categorical data, continuous data, statistical distributions (and interpreting p-values), and random number assignment (for experimental design).
Microsoft Excel Spreadsheets for Statistical Calculations
In addition to general statistical calculations, it includes graphing functions for interactions and moderated mediations. Tutorials for using excel for basic statistics can be found at websites from Clemson University or University of Toronto.
This website from the Department of Mathematics and Statistics at Smith College includes tutorials for dataset conversion, R, Stata, and SAS.
SPSS Online Training Workshop
The most comprehensive (and free) resource for learning SPSS online. Includes text and video clips. Assumes no prior knowledge of SPSS.
Other Resources for Advanced Statistical Methods
Fully downloadable text by Tucker and MacCallum (1993). A multivariate statistical technique for detecting latent (hidden) variables in your data. Highly recommended for those working with psychological tests and measures.
Logistic Regression and Discriminant Analysis
Provides an overview of multivariate statistical techniques for working with categorical dependent variables.
Structural Equation Modeling
Provides an overview of a multivariate statistical technique that combines factor analytic strategies with path analysis. You can find more information and resources at http://davidakenny.net/cm/causalm.htm.
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