::Free Statistics and Forecasting Software::

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:: Free Statistics Software (Calculator) - Web-enabled scientific services & applications ::

All rights reserved. The non-commercial (academic) use of this software is free of charge. The only thing that is asked in return is to cite this software when results are used in publications.

Wessa.net offers these software applications free of charge:

Descriptive Statistics SoftwareThis 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
Regression SoftwareThis 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).
Statistical DistributionsFeatures 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.
Statistical Hypothesis Testing SoftwareOffers statistical testing of a variety of hypotheses: Population Mean, Mean (critical value, p-value, type II error, sample size), Skewness/Kurtosis, Quasi Random-Walk
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.
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.
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.
Mathematical Equation PlotterPlots 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).
Time Series DatabaseUse 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.
R modulesAnyone can create, maintain, and publish R-based modules (subject to editorial acceptance) and make them freely available within the Wessa.net framework.

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.

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.

Sample Size Software(sample size, sample accuracy, confidence interval)
Factor Analysis(Factor Analysis, Principal Components)
Clustering Software(Agglomerative Nesting, Hierarchical Clustering)
Reproducible ExamplesThis 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.
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...)

NEWS FEED from BBC News : Science and Nature
India gears up for big Mars momentIndia hopes to make history shortly by putting its first satellite in orbit around the Red Planet.
Obama makes impassioned climate pleaUS President Barack Obama tells a UN climate change meeting in New York that the problem is growing faster than the world's efforts to address it.
Liberia in 'trees for cash' dealLiberia is to become the first nation in Africa to completely stop cutting down its trees in return for development aid.
Brian Cox: 'Multiverse' makes senseThe presenter and physicist Brian Cox says he supports the idea that many universes may exist.
Cosmic study 'underestimated' dustScientists who claimed to have found evidence for a cosmic super-expansion just after the Big Bang underestimated a key confounding factor in their research, according to a new analysis.
Molten metal batteries for the gridEngineers have invented a battery made of three liquefied metals, which they say is efficient and cheap enough to store power on the electric grid.
Scientists debate sea-ice trendsResearchers meet in London to discuss sea-ice trends, as the Arctic reaches its summer low extent and the Antarctic pushes on to another record high.
Global protests over climate changeStreet protests demanding urgent action on climate change attract hundreds of thousands of marchers across more than 2,000 locations worldwide.
China overtakes EU on 'per head' CO2New research shows China's rising emissions per head of population have overtaken the EU while the global total reaches a new high.
'Artificial eye' to detect particlesThe human eye has inspired physicists to create a processor that can analyse particle collisions 400 times faster than currently possible.
Rockefellers to divest fossil fuelsThe Rockefeller family, which made its fortune from oil, is to sell its investments in fossil fuels and put money into clean energy.
Slippery banana study wins Ig NobelResearch that investigated why bananas are slippery when you step on them wins one of this year's Ig Nobel prizes.
Forest land rights need global focusRecognising the land rights of local people could provide cost-effective protection for many of the world's tropical forests, a report says.
Europeans drawn from three 'tribes'Most present-day Europeans are a mixture of three ancient populations, according to a major study published in the journal Nature.
Goldfish has brain operationAn Australian goldfish called George is recovering from successful microsurgery in which a large tumour was removed from his brain.
Murder 'comes naturally' to chimpsA major international study finds that killings among chimpanzees result from normal competition, not human interference.
Nasa picks astronaut ship designsThe US space agency picks the companies it hopes can take the country's astronauts back into space - a capability lost when the shuttles retired in 2011.
Richard III death injuries revealedKing Richard III was probably killed by two blows to the head during a "sustained attack", according to new research.
China boy finds 3,000-year-old swordArchaeologists date the weapon to the Shang or Zhou dynasties - the dawn of Chinese civilisation.
Ebola vaccine trial beginsA trial of an experimental vaccine against the Ebola virus is to begin in Oxford.
Ebola global security threat - ObamaUS President Barack Obama calls the Ebola outbreak in West Africa a threat to security worldwide while announcing a larger US role, including 3,000 troops, to help fight the virus.
Rosetta comet landing site chosenEurope's Rosetta mission, which aims to land on a 4km-wide comet later this year, identifies what it thinks is the safest place to touch down.
Better mobility key for clean citiesEffective urban transit systems can encourage people out of their cars and provide a cost-effective way to tackle climate change, a report suggests.
Inky prints show state of hedgehogsHedgehogs are more thinly spread in the UK than previously believed, a study using ink pads to record their paw prints reveals.
Climate change remedies 'affordable'A global commission says the extra costs of tackling climate change will be 'modest', but doing nothing could put the world economy at risk.
Ancient China fish 'nearly extinct'The Chinese sturgeon, thought to have existed for more than 140 million years, is now on the brink of extinction, say local media.
Brazil builds giant Amazon towerConstruction has begun on a giant observation tower in the heart of the Amazon basin in Brazil to monitor climate change.
Western Australia shark cull blockedWestern Australia's shark cull is to be halted after the state's environmental regulator advised against it, citing "scientific uncertainty".
'Giant swimming dinosaur' unearthedA giant fossil, unearthed in the Sahara desert, has given scientists an unprecedented look at Spinosaurus - the largest-known carnivorous dinosaur.
Blue whale numbers bounce backResearchers believe that California blue whales have recovered in numbers and the population has returned to sustainable levels.
Spitting fish 'adjust for distance'Scientists say the jets of water that archer fish use to shoot down prey are precisely tuned, to make maximum impact at just the right distance.
VIDEO: UN adviser on 'alarming climate change'US economist and UN adviser Jeffrey Sachs has told the BBC he thinks governments are still not working hard enough to take care of climate change.
VIDEO: Woolly mammoth skeleton up for auctionA rare skeleton of a woolly mammoth is set to be sold at auction in the UK in November with a guide price of £150,000 to £250,000
AUDIO: Space inflation and a physics betOne of the biggest scientific claims of the year has received another set-back, putting the result of a bet between two significant physicists in jeopardy.
VIDEO: Radio query reveals garden cannabisPatricia Hewitson from Exmouth, Devon, unwittingly grew a 5ft (1,5m) tall cannabis plant from a pack of bird seeds - but her error was only revealed when she contacted a radio phone-in show.
AUDIO: How black can black be?A material dubbed the darkest substance on earth is being used creatively by internationally acclaimed artist Sir Anish Kapoor.
VIDEO: Brian Cox: 'Multiverse' makes senseThe presenter and physicist Brian Cox says he supports the idea that many universes can exist at the same time.
AUDIO: Could 'marshmallow test' teach you?The famous experiment in child psychology from the the 1960s which became known as the marshmallow test has been updated by the experiment's inventor, Walter Mischel.
AUDIO: When Temple of Mithras was unearthedA project is under way calling for people with memories of the excavation if the Temple of Mithras to come forward to tell their stories and share their pictures of the event.
Mangalyaan: Will India's Mars mission reach the orbit?Will India's Mars mission reach the orbit?
How lasers revealed a lost city in the jungleHow lasers have revealed an ancient city beneath the forest
The 'green blob' loves Mr Ban - but for how long?Ban Ki-moon wins hearts on the street, but will charm work on leaders?
Mars Maven mission arrives in orbitUS satellite arrives in orbit around the Red Planet
Tomb mystery captivates GreeceSecrets of ancient burial site keep Greeks guessing
Astronomy Photographer of the Year 2014Twinkling stars and swirling gases - winning visions of the night sky
Ants v humansDo all the world's ants really weigh as much as all the humans?
VIDEO: Overcooked? The hi-tech smart panThe pan that aims to eliminate guesswork from cooking
From toilet to table, overcoming the ‘yuk’ factorHow Haitians overcame the 'yuk' factor
The scary element that helps probe space's secretsThe scary element that helps probe space's secrets
Build your Martian dream homeIs this how the cities of Mars will be built?

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To cite Wessa.net in publications use:
Wessa, P. (2014), Free Statistics Software, Office for Research Development and Education,
version 1.1.23-r7, URL http://www.wessa.net/

© All rights reserved. Academic license for non-commercial use only.
The free use of the scientific content, services, and applications in this website is granted for non commercial use only. In any case, the source (url) should always be clearly displayed. Under no circumstances are you allowed to reproduce, copy or redistribute the design, layout, or any content of this website (for commercial use) including any materials contained herein without the express written permission.

Information provided on this web site is provided "AS IS" without warranty of any kind, either express or implied, including, without limitation, warranties of merchantability, fitness for a particular purpose, and noninfringement. We use reasonable efforts to include accurate and timely information and periodically update the information, and software without notice. We make no warranties or representations as to the accuracy or completeness of such information (or software), and it assumes no liability or responsibility for errors or omissions in the content of this web site, or any software bugs in online applications. Your use of this web site is AT YOUR OWN RISK. Under no circumstances and under no legal theory shall we be liable to you or any other person for any direct, indirect, special, incidental, exemplary, or consequential damages arising from your access to, or use of, this web site.

Software Version : 1.1.23-r7
Algorithms & Software : Patrick Wessa, PhD
Server : www.wessa.net

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