This page, created by Susan Holmes of Stanford University, discusses the theory behind the bootstrap. It discusses the empirical distribution function as an approximation of the distribution function. It also introduces the parametric bootstrap. Holmes break down the lesson into different subsets, t more

This introduction to cryptography is a collection of applets including: "Let's Make A Deal," "Let's Make a Deal II," "Monkey Words," "Entropy," "Vigenere," "Rectangular Transposition," and "Monoalphabetic Substitution." This is a wonderful collection of applets for any classroom studying statistics.

To assess the significance of any particular instance of r, enter the values of N[>6] and r into the designated cells, then click the 'Calculate' button. Application of this formula to any particular observed sample value of r will accordingly test the null hypothesis that the observed value comes f more

This page is an overview of the impact of computers on the field of physics. Are computers absolutely necessary for research, especially in physics? In 1987 the Nobel Prize for physics went to Alex Muller and Georg Bednorz for their work on superconductivity which did not require a computer for thei more

Generate simulated experimental data for four studies - Imprinting in Precocial Birds (Rajecki), The Etiology of Schizophrenia (Main), Motivational Factors in Routine Performance (Mueller), and Social Facilitation (Rajecki & Halstead-Nussloch). For each study you have control over the variables that more

Graph is "an open source application used to draw mathematical graphs in a coordinate system." Anyone who wants to draw graphs of functions will find this program useful. The program makes it very easy to visualize a function and paste it into another program. It is also possible to do some mathemat more

This collection of calculators, created by Thomas Kirkman of the College of Saint Bendict/Saint Joseph, allows users to perform a number of statistical applications. Each provides background on the procedure and an example. Users can compute descriptive statistics and perform t-tests, Chi-square tes more

This tutorial, created by Thomas W. MacFarland of Nova Southeastern University, explains the theory and use of two-way ANOVA and demonstrates it with an example on final exam scores. Data sets are given in both SPSS and Minitab format. This is a nice example of variance testing. MacFarland's layout more

This lesson is based on several interesting problems. Each problem has a somewhat unexpected answer; in fact, many people have a hard time accepting experimental results for these problems, as the results may seem counterintuitive. This very difference in expectations and actual results leads to a d more