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  • Parametric and Nonparametric Statistics

    This page discusses the differences in parametric and nonparametric tests and when to use then.

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  • Friedman's Test

    This tutorial on Friedman's Test includes its definition, assumptions, characteristics, and hypotheses. An example using output from the WINKS software is given, but those without the software can still use the tutorial. An exercise is given at the end that can be done with any statistical software package.

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  • Kruskal-Wallis Test

    This tutorial on the Kruskal-Wallis test includes its definition, assumptions, characteristics, and hypotheses as well as procedures for graphical comparisons. An example using output from the WINKS software is given, but those without the software can still use the tutorial. An exercise is given at the end that can be done with any statistical software package.

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  • Mann-Whitney Test

    This tutorial on the Mann-Whitney test includes its definition, assumptions, characteristics, and hypotheses as well as procedures for graphical comparisons. An example using output from the WINKS software is given, but those without the software can still use the tutorial. An exercise is given at the end that can be done with any statistical software package.

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  • How Statistical Educators Can Attract Students to the Discipline of Statistics

    This website is a resource of teaching methods and approaches that instructors at all levels of statistics education can use to generate student interest in pursuing more study or a career in the field of statistics.

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  • Gamma Process Applet

    This applet draws a Gamma process (a stochastic process with independent increments X(s + t) - X(s).) Click the mouse in the window to start zooming. Click again to stop. The total increase occurs at a countable set of jumps. The simulation gives some idea of this.

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  • Brownian Motion Applet

    This applet draws one-dimensional Brownian motion. Click the mouse in the window to start zooming. Click again to stop. Since Brownian motion is self-similar in law, all of the zoomed pictures look the same.

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  • Two Sample Tests

    This lesson introduces two sample hypothesis testing for means and discusses the one-tailed and two-tailed t-tests.

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  • Confidence Limits

    This lesson introduces confidence intervals and how to calculate them. A multiple choice test is given at the end.

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  • Standard Errors and The Central Limit Theorm

    This lesson introduces the Central Limit Theorem and discusses it in terms of the normal distribution, binomial distribution, and Poisson distribution.

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