| 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 |
| Saturn probe to acquire Earth image | The Cassini probe in orbit around Saturn is going to picture the ringed planet in a special photo that also includes a distant Earth. |
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| 'Hoff' crab's oceanic 'road trip' | A hairy crab named after US actor David Hasselhoff hitched a ride on an ocean "super-highway" to colonise deep sea vents in the Atlantic tens of millions of years ago. |
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| Applause is a 'social contagion' | The quality of a performance does not drive the amount of applause an audience gives, a study suggests. |
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| Echoes reveal the shape of a room | The geometric shape of a room can be mapped using the echoes from a sound recorded by four microphones placed inside a room, research finds. |
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| Wet summers down to warmer Atlantic | Meteorologists and scientists meeting at the Met Office say the UK's damp summers could be caused by a warmer Atlantic Ocean. |
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| Europe's Mars missions 'on track' | Europe's plans to explore Mars with a satellite in 2016 and a rover in 2018 take a big step forward with the signing of new industrial contracts. |
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| 'Quiet epidemic' of UK male cancer | Action is needed to fight a "quiet epidemic" of oesophageal cancer, which is on the rise in the UK, particularly in men, say cancer experts. |
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| Shark 'nursery' found on coral reef | Edinburgh marine biologists discover a deep-sea shark spawning ground on Scotland's only inshore coral reef. |
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| Herschel telescope switched off | Controllers sever all communications with Europe's billion-euro Herschel space telescope, formally bringing to a close the observation phase of the mission. |
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| China retakes supercomputer crown | A China-based supercomputer has been ranked the world's fastest, offering nearly double the processing speeds of the US's most powerful system. |
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| Overseas climate change threatens UK | A new report suggests that climate change in other countries will impact the UK more quickly than rising temperatures at home. |
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| Ash genome reveals fungus resistance | Scientists sequence the genome of a type of ash tree which is resistant to the deadly fungal disease sweeping the country. |
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| Older beetles 'make better dads' | Older male burying beetles work harder at parental care and mating than younger counterparts, a study suggests. |
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| Gagarin air crash details emerge | New details have emerged about the air crash that killed Yuri Gagarin - the first man in space. |
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| Trans-US solar plane reaches Dulles | A solar powered plane aiming to cross the US lands at Washington Dulles airport, completing the fourth leg of the coast-to-coast endeavour. |
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| Perfect pitch may not be 'perfect' | People classified with perfect pitch may not actually be as in tune with the sounds they hear as they think, a study finds. |
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| Science plan lands 'star' researcher | A £50m project to attract world-class scientists to Wales makes its first appointment - a leading stem cell researcher looking at diseases of the nervous system. |
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| A350 marks new phase in aero-engines | Rolls-Royce’s Trent XWB engine, fitted to the new Airbus A350, is claimed to be the most efficient aero power unit yet designed. |
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| Men 'to blame for the menopause' | Men choosing young women as partners meant fertility in older women was pointless, leading to the menopause, researchers suggest. |
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| Portrait honours physicist Higgs | The Royal Society of Edinburgh unveils a new portrait of scientist Prof Peter Higgs who gave his name to the so-called "God particle". |
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| Deep-diving mammals' secret revealed | Study solves the mystery of one of the most extreme adaptations in the animal kingdom: how marine mammals store enough oxygen to hold their breath for up to an hour. |
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| Cheetah acceleration key to success | A study of the movements of cheetahs suggests that their hunting prowess comes not from sheer speed, but from rapid acceleration and deceleration. |
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| Bee ban pesticides have wider impact | A class of pesticides linked to the death of bees may be harming other species and the wider environment. |
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| Record rise in US oil production | A report by oil giant BP highlights that the US saw the largest single year increase in oil production ever recorded in 2012. |
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| British wheat crop 'down by third' | Britain's wheat harvest could be a third smaller than it was last year because of extreme weather conditions, the National Farmers' Union warns. |
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| China outsources carbon emissions | New research shows China is outsourcing carbon dioxide emissions within its own borders, just as the West outsources emissions to China. |
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| Cuckoos clocked using satellite tags | Four cuckoos caught at sites in Lochalsh and Skye are fitted with satellite tags in an effort to track their migrations to Africa. |
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| Police inquiry over eagle nest claim | Police are investigating allegations that a white-tailed eagle nest was destroyed on an estate in Angus, the BBC learns. |
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| Bad winter sees 'huge loss of bees' | Over a third of honey bee colonies were lost over the winter, according to a survey by the British Beekeepers Association |
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| VIDEO: Seven-spot ladybirds in decline | The most common species of the ladybird in Britain is in decline, according to research from the Centre for Ecology and Hydrology. |
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| VIDEO: Freediver reveals breath-holding secrets | Freediver Adam Drzazga reveals the training and relaxation exercises required to hold his breath for more than six minutes. |
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| AUDIO: Professor's 'brain soup' experiment | Brazilian professor's "brain soup" shows the power of the human brain |
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| VIDEO: Cat-cams capture secret lives of felines | An ambitious project set up by leading scientists and the BBC's Horizon science documentary set out to discover what cats get up to when they are outdoors. |
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| VIDEO: 'Extinct' horses released in China | Rare Przewalski horses have been returned to their native habitat in northwest China |
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| VIDEO: Deep-diving mammals' secret revealed | Scientists say they have solved the mystery of how marine mammals store enough oxygen to hold their breath for up to an hour. |
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| VIDEO: Grass-free lawn opens in London park | A floral, scented lawn, planted in a west London park is friendlier to pollinating insects than traditional grass, according to researchers. |
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| VIDEO: Ash dieback signs emerge in UK woods | A year since it was first discovered in the wider environment and ancient woodland, the impact of the disease is starting to become evident. |
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| What's going on with the weather? | What's going on with the weather, asks David Shukman |
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| Colours of space - Visions of the Universe | The vivid hues astronomers use to bring the cosmos to life |
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| Man v seal: How we compare with our marine cousins | Can a human hold their breath for as long as a marine mammal? |
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| How Napoleon's semaphore telegraph changed the world | How did these strange signals change the way we communicate? |
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| The quest to build a brain in the lab | The quest to build a brain in the lab |
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| The living dead: new way to embalm | How new embalming method will aid surgeons |
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| The plane Airbus did not want built | The plane that Airbus did not want to build |
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| Inside Facebook's new arctic data centre | Inside the social network's huge arctic data centre |
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| Secret life of the cat: The science of tracking our pets | The technology and science of monitoring cat behaviour |
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