| Descriptive Statistics Software | This collection of Free Statistics Calculators offers a wide range of descriptive and explorative types of statistical measures and analysis: Central Tendency, Average, Mean, Median, Variability, Interquartile Range, Concentration, Lorenz Curve, Gini Coefficient, Skewness, Kurtosis, Quartiles, Percentiles, Notched Boxplot, Histogram, Correlation, Partial Correlation, Rank Correlation (Spearman and Kendall), Simple Regression, Kernel Density Estimation, Harrell-Davis Quantiles, Bivariate KDE, Correlation Matrix, Stem-and-leaf plot, Explorative Data Analysis
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| Regression Software | This is a collection of Regression-based types of analysis for single and multiple equations: Multiple Regression Equations, Bias-Reduced Logistic Regression (Firth method), Recursive Partitioning (Classification & Regression Trees), Variance-based Structural Equation Modeling (Partial Least Squares - Path Modeling).
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| Statistical Distributions | Features Random Number Generators, PPCC Plots (incl. Tukey lambda), and Statistical Distribution Fitting Modules (Maximum Likelihood) for a series of important distributions: Beta, Inverted Beta, Cauchy 1, Cauchy (2 parameters), Chi, Chi Square (1 parameter), Chi Square (2 parameters), Erlang, Exponential, Fisher F, Gamma, Inverted Gamma, Gumbel, Laplace, Logistic, Lognormal, Normal, Pareto, Power, Rayleigh, r-Distribution, Rectangular (Uniform), Student t, Triangular, and Weibull.
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| Statistical Hypothesis Testing Software | Offers statistical testing of a variety of hypotheses: Population Mean, Mean (critical value, p-value, type II error, sample size), Skewness/Kurtosis, Quasi Random-Walk
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| Time Series Analysis (R modules) | Performs Univariate Box-Jenkins ARIMA modeling, forecasting, and residual model checking. In future this module will replace the old versions based on C code.
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Statistics Education at Simon Fraser University
| This section contains various types of Statistics Software for Statistics Education that have been created by Larry Weldon at Simon Fraser University, Vancouver, Canada.
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Statistics Education at Aston University
| This section contains various types of Statistics Software for Statistics Education that have been created by Ian Holliday at Aston University, Birmingham, UK.
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| Mathematical Equation Plotter | Plots mathematical equations, statistical distributions, derived functions, cumulative functions, and apply numerical integration. Equations can be formulated in algebraic form, for instance: y=exp(a*sin(x)+b). The equation is sent through an interpreter and the analysis and equation chart is generated (in .png format).
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| Time Series Database | Use this Database to gain access to thousands of time series about financial markets. Note: this application is also available from within our Scientific Forecasting Software.
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| R modules | Anyone can create, maintain, and publish R-based modules (subject to editorial acceptance) and make them freely available within the Wessa.net framework.
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| Multiple Regression Software (C module) | Performs Multiple Regression Equation Modeling with the following features: Ordinary Least Squares Estimation, Heteroskedasticity tests, Autocorrelation tests, Misspecification tests, Multicollinearity tests, Regression Charts, ANOVA tables, Goodness of Fit, and much more.
Several types of regression will be available in future.
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Scientific Forecasting Software (C modules)
| Performs Univariate Box-Jenkins ARIMA modeling, forecasting, and various bootstrap simulation methods for the estimation of financial profit density functions according to the following strategies: Buy&Hold, Alexander's Filterrule, truncated Koyck lag-based MACD. Various types of time series analysis tools are available: (Partial) Auto Correlation Function, Spectral Analysis, Variance Reduction Matrix, Standard Deviation-Mean Plot, trimmed Skewness & Kurtosis, suspended rootogram displays, percentiles, concentration, histograms, foreward & backward running autocorrelation, ARMA parameter estimation, and much more.
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| Sample Size Software | (sample size, sample accuracy, confidence interval)
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| Factor Analysis | (Factor Analysis, Principal Components)
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| Clustering Software | (Agglomerative Nesting, Hierarchical Clustering)
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| Reproducible Examples | This module provides access to interesting examples that have been published in articles or textbooks together with all the data and statistical software that is needed to reproduce them. All software is readily available online, and the source code of the underlying analysis can be viewed after successful completion.
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| Financial Calculators | (currency decimal, currency fraction, present value, future value, Black-Scholes option prices, interest payment, principal payment, number of periods, effective interest, nominal interest, Quasi Random-Walk identification, trading performance statistics, etc...)
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| NEWS FEED from BBC News : Science and Nature |
| Knighthood for UK chief scientist | The UK chief scientist John Beddington receives a knighthood in the Queen's Birthday Honours list. |
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| Japan unfurls solar sail in space | Japanese scientists are celebrating the successful deployment of their solar sail, Ikaros. |
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| Exoplanet spotted on the move | Astronomers say they have tracked, for the first time, an extra-solar planet in orbit around a young star. |
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| Badger cull 'on hold' for appeal | A cull on badgers in Wales is to be delayed pending an appeal, the Welsh assembly's rural affairs minister announces. |
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| Gulfs remain after climate talks | UN climate talks end in Bonn with talk of an improved mood but major gulfs remain between blocs. |
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| South Korea rocket 'debris' found | A South Korean navy ship has recovered debris apparently from a failed rocket launch from the South Korean space centre at Goheung on Thursday. |
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| Seal whiskers sense faraway fish | Harbour seals are able to detect fish that are up to 100m away using only their whiskers, say scientists. |
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| Prehistoric pelican had big beak | Pelicans have sported big beaks for at least 30 million years, the discovery of the oldest known pelican fossil reveals. |
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| Weighty argument... British professor queries gold World Cup | A chemistry professor says that if the World Cup trophy was really solid gold it would be too heavy for footballers to lift. |
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| Many comets, including Halley's, 'formed around other stars' | Many famous comets, including Halley and Hale-bopp, may have formed in other Solar Systems, a new theory proposes. |
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| Richard Black on what's happening to our shared environment | |
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| Spaceman | The best view of an asteroid capsule's Earth return |
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| Polar diary | Daily updates from key polar science conference in Oslo |
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| Earth Watch | UN climate talks strive to keep the ball in play |
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| Back to the future | Wave energy device updates 1985 technology |
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| Indoor garden | How the Victorians fuelled our love of flowers in the home |
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| Butterfly 'bling' | Scientists release dazzling pictures of tropical butterflies |
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| Decision time for whale conservation | It is time for International Whaling Commission members to end two decades of deadlock and reach a shared vision on conservation. |
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| Hooking fishing 'pirates' | It's time to close the net on fishing "pirates" who threaten to undermine vital marine ecosystems. |
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| Rare fungus discovered in England | A tiny, rare orange fungus has been sighted in England for the first time, the Wildlife Trusts announce. |
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| In Pictures: Butterfly 'bling' | Dazzling pictures have been released by scientists working on tropical butterflies. |
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| BP spill 'double early estimates' | The BP spill may have sent twice as much oil leaking into the Gulf of Mexico as previously thought, US experts estimate. |
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| Physicists burst bubble mystery | With the help of high-speed video, scientists discover there is far more to bursting bubbles than meets the eye. |
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| South Korean rocket 'explodes' | A South Korean rocket appears to have exploded after take-off, ending the country's space-launch industry bid. |
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| Top prize for Swiss solar pioneer | The inventor of a low-cost solar cell that could create electricity generating windows has won the Millennium Technology Prize. |
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| DNA 'unlocks Jewish diaspora' | Scientists have shed light on the complexities of Jewish heritage with an in-depth genetic study. |
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| Asian rivers face mixed futures | Melting glaciers in the Himalayas will have varying impacts on food security the region's major river basins, a study says. |
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| Sudden oak death reaches Wales | A deadly tree and plant disease first found in the UK in 2002 has spread to Wales, the Forestry Commission says. |
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| Rich slammed on carbon 'cheating' | Campaigners accuse some rich nations of seeking new rules to try to gain carbon credits for "business as usual". |
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| EU biofuels 'should be certified' | Plans to certify biofuels to ensure they help cut emissions are announced by the European Commission. |
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| Oil extraction becoming riskier | The UK's former chief scientific adviser says "unconventional" oil drilling will pose technological challenges environmental risks. |
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