 Sprott's Fractal Gallery  Julien C. Sprott, Dept. of Physics, Univ. of Wisconsin
Images from programs and books by the site's author, with information about these books and software packages, and MSDOS software packages available for download. Every day a new fractal image is automatically generated on this page by a variation of
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 Sprouts for Spring  Ivars Peterson (MathLand)
The game of sprouts has a way of growing on you. This twoperson, pencilandpaper game is simple enough that children can play it. Yet its intricacies provide much food for mathematical thought. The players start with a certain number of dots scattered
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 SP Spectral Theory (Front for the Mathematics ArXiv)  Univ. of California, Davis
Spectral Theory preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 The SPSS Decision Maker  Maurits Kaptein
This is a website that guides you through a number of steps to select a statistical technique. Developed for those who do know the basic concepts of research statistics and experimental design but need help determining the final test.
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 Square Cell  Brian Prentice
Three 2D Cellular Automata explorers for Windows.
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 Square of the Hypotenuse  Ivars Peterson (MathTrek)
Some history of the legend of the discovery of the Pythagorean theorem: in his textbook The History of Mathematics, Roger Cooke of the University of Vermont describes how the Babylonians might have discovered the Pythagorean theorem more than 1,000 years
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 Square Wheel (MatheMUSEments!)  Ivars Peterson (Math Muse for Kids)
A square wheel may be the ultimate flat tire. There's no way it can roll over a flat, smooth road without jolting the rider again and again. Stan Wagon, a mathematician at Macalester College in St. Paul, Minnesota, has a bicycle with square wheels. It's
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 Squaring the Circle  MacTutor Math History Archives
Linked essay covering the problem of squaring the circle in the form which we think of it today, which originated in Greek mathematics: given a circle, construct geometrically a square equal in area to the given circle. This article discusses the history
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 SR Education Associates, LLC  Steven Rasmussen
Consulting services in educational publishing, mathematics curriculum development, educational technology design and development, educational marketing, professional development for mathematics teachers, advocacy for mathematics and STEM education, and
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 Srinivasa Ramanujan  Sociedad Andaluza de Educación Matemática THALES
Biografía de Ramanujan: Presentación; Formación; Trabajo; En Cambridge; Su obra; Bibliografía; Otras páginas de interés
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 SsgtMath  Ricardo Sinclair
Ten to fifteen minutelong whiteboard introductions to Common Core State Standards (CCSS) ideas, geometry constructions, proofs, precollege algebra, college algebra, and more.
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 SStreams: Mathematica  Andrzej Kozlowski, Ed.; eNoteBooks Ltd.
Links to Mathematicarelated books and publications; developer, consulting and training companies; jobs requiring Mathematica; programs and packages to download free or for a fee; Web resources; and a section on skills: people with Mathematica programming
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 Stan's Library  Stanislav Sykora
A library including a section of mathematical articles, reviews, etc..
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 Stardust Equations  Keith Devlin (Devlin's Angle)
On Sunday, February 7, at 4:04 PM, a Lockheed Martin Delta II rocket lifted off from Cape Canaveral carrying an unmanned spacecraft about the size of an office desk, having the romantic name of Stardust. If all goes well, on January 15, 2006, the spacecraft
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 Star Fractal  Pierre Dufilie IV
A Java Applet displaying the Mandelbrot fractal set using exponential color smoothing. The program allows the user to zoom in and out of the fractal in the complex plane.
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 Star Grades: The Best Tutor  Star Grades.com
Offers $20/hr online tutoring in multiple subjects, including SAT preparation. Package deals available.
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 StarLogo  Epistemology and Learning Group, MIT Media Lab
A programmable modeling environment for exploring the workings of decentralized systems. With StarLogo, you can model (and gain insights into) many reallife phenomena, such as bird flocks, traffic jams, ant colonies, and market economies. StarLogo is
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 StatAssist: Distribution Calculator & Grapher  Mathwave Technologies
StatAssist displays all types of distribution graphs and properties, and allows users to generate random numbers from any distribution, within specified parameters. For Windows; free trial available.
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 State Institute of Statistics (SIS)  Republic of Turkey
The agency in charge of collecting statistics for the country of Turkey. Includes tables and charts of key social, economic, and environmental statistics and a dictionary of important statistics and economics terms arranged by subject. Some articles
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 StatiBot: Your expert system for inferential statistics  Dominik Heeb
An interactive tool for data analysis. Enter your data by hand or copy them from another program, then answer a series of questions. StatiBot will perform appropriate statistical tests, comment on test results, and create graphs. Site includes example
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 Statiscope  Mikael Bonnier
Statiscope presents summarizing data and descriptive statistical charts. In the applet you can enter data manually or download data over the Internet. Charts included: Distribution, Probability mass, Density, Box plot, Stem & leaf; also other features
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 Statista  Statista Inc.
Statistics and other quantitative data on education, schools, employment, and hundreds of international industries, aggregated from more than 18,000 sources that include the Mendelsohn Affluent Survey, trade publications, scientific journals, and government
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 Statistical Assessment Service (STATS)
STATS is a nonprofit, nonpartisan resource on the use and abuse of science and statistics in the media. Its goals are to correct scientific misinformation in the media and in public policy resulting from bad science, politics, or a simple lack of information
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 Statistical Consultants Ltd  Dion Walker
Data analytics and other consulting services. See, in particular, the New Zealand company's blog, which dates back to 2010 with posts such as "Battle of Britain Casualty Data," "Gretl: A free alternative to EViews," "Life expectancy at birth versus GDP
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 Statistical & Data Analysis Software  NCSS Statistical Software
Statistical analysis in a format that imports and exports all major spreadsheets, databases, and statistical file formats.
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 Statistical Education through Problem Solving (STEPS)  STEPS TLTP Consortium
The STEPS consortium in the U.K. has developed problembased modules to support the teaching of Statistics in Biology, Business, Geography, (Windows) and Psychology (Windows and Mac). The software is freely available to educational institutions, and can
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 Statistical Forecasting  Robert Nau
Lecture notes and teaching materials for a course on statistical forecasting, with particular focus on regression and time series models. Output from Statgraphics and RegressIt illustrate sections such as "Get to know your data" (famous forecasting quotes,
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 Statistical Mechanics, Structure of Matter  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to statistical mechanics, structure of matter, the study of largescale systems of particles, including
stochastic systems and moving or evolving systems. Specific types of matter studied include fluids,
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 Statistical Reference Datasets  Applied and Computational Math Division, NIST
A project designed to improve the accuracy of statistical software by providing reference datasets with certified computational results that enable the objective evaluation of statistical software. Dataset archives (Analysis of Variance, Linear Regression,
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 Statistical Rules of Thumb  Gerald van Belle
This companion website to Statistical Rules of Thumb, published by John Wiley & Sons, Inc., offers free PDFs of chapter two ("Sample Size") and more than a dozen "monthly rules of thumb," such as "Use Text for a Few Numbers, Tables for Many Numbers,
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 Statistical Thinking for Managerial Decision Making  Prof. Hossein Arsham; University of Baltimore
Course description: Statistical summary measures, probability, random variables and their distributions: estimation and hypothesis testing, correlation and regression analysis, ANOVA, and their applications to business problems will be presented, and
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 Statistica  StatSoft, Inc.
A comprehensive, integrated statistical data analysis, graphics, database management, and custom application development system featuring a wide selection of basic and advanced analytic procedures for science, engineering, business, and data mining applications.
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 Statistician Jokes  Verhagen, Gregg
Material extracted from science jokes posted to rec.humor, sci.math, and a
few other Usenet newsgroups. 43% of all statistics are worthless; 3 out of 4 Americans make up 75% of the population; 80% of all statistics quoted to prove a point are made up
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 Statistics101: Resampling  John Grosberg
Software for statistics and probability, it can be used to teach concepts via simulation. It can also be used for real bootstrap, Monte Carlo and simulation applications. Runs on any platform supporting Java 1.4.2 or better.
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 Statistics Canada  Ottawa, Ontario, Canada
Canada's national statistical agency, which is required to collect, compile, analyse, abstract and publish statistical information on virtually every aspect of the nation's society and economy. Programs are organized into three broad areas: demographic
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 STATISTICS.COM
A source for information about statistics software (major packages like SAS, SPSS and SPLUS, shareware, and smaller packages), as well as about statistics analysis, data analysis, and short courses in statistics  messy data, design and analysis of experiments,
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 Statistics  Dave Rusin; The Mathematical Atlas
A short article designed to provide an introduction to statistics: the science of obtaining, synthesizing, predicting, and drawing inferences from data. Elementary calculations of mean and standard variation suffice to summarize a large, finite,
normallydistributed
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 Statistics Demonstrations with Excel  Erich Neuwirth
Experimental examples, for which you must have installed Excel as a viewer for your Web browser (instructions are supplied). Correlation Visualized: See a data set with a given correlation coefficient, and change the correlation by moving a slider. Central
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 Statistics Every Writer Should Know  Robert Niles; Niles Online
Numbers can't talk, but they can tell you as much as human sources can. Here, described in plain English, are some basic concepts in statistics that every writer and reader should know. For beginners: Mean, Median, Percent; the next step: Per capita and
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 Statistics Faculty Lounge  John Wiley and Sons, Inc.
Links to statistics reference tools on the Web, popular statistics journals, today's newspaper, and sample chapters of Wiley's latest college texts, with brief descriptions and tables of contents.
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 Statistics Forums
A discussion forum for students seeking help with statistics and probability.
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 Statistics Glossary  Easton, McColl
Basic definitions; Presenting Data; Sampling; Probability; Confidence Intervals; Hypothesis Testing; Paired Data, Correlation and Regression; Design of Experiments and ANOVA; Categorical Data; Nonparametric Methods; Time Series Data; and an alphabetical
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 Statistics Greenland (Kalaallit Nunanni Naatsorsueqqissaartarfik/Grønlands Statistik)  Dorit Olsen
Information about Statistics Greenland, map of Greenland, and key socioeconomic figures. The Statistical Yearbook,with data and tables of cultural, economic, social, political, geographical, and climate information about Greenland, is available in PDF
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 Statisticshelpdesk.com
Subject overviews and tutoring services for statistics homework and programming in SAS, Minitab, R, SPSS, Matlab, Eviews, and Gretl.
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 Statistics How To  Stephanie
A resource which includes stepbystep instructions for undergraduate statistics students for specific problem types, reference tables, and visual calculators that actually explain how computations are performed using the student's own inputted data.
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 Statistics Iceland
The statistics ministry of the government of Iceland. Key socioeconomic figures; press releases; monthly statistics in PDF format; methodological information. Site also available in Icelandic.
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 Statistics Indonesia (Badan Pusat Statistik)  Republic of Indonesia
The statistics collection department of the government of Indonesia. Glossary of statistical terms, key socioeconomic figures for Indonesia by subject and region, census results, methodology information, and links to regional offices. Recent economic
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 Statistics, Measurement Uncertainty, and the Number of Galaxies in the Universe Lab  Dennis Zaritsky; Univ. of California at Santa Cruz
From a course in observational astronomy, a lab for exploring some basic issues regarding statistics in astronomy and measurement uncertainties, and finally
produceing an estimate of the number of galaxies in the Universe (with its associated uncertainty).
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 Statistics Netherlands
A government organization that collects, interprets, and presents information about Dutch society. Tables of key socioeconomic figures for the Netherlands; publications and press releases, which may be ordered or downloaded in PDF format; introduction
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 Statistics New Zealand (Te Tari Tatau)
New Zealand's official statistics agency. Key data are available online, with a catalog of publications and discussion forums.
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