::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
Space project will go on - BransonVirgin founder Sir Richard Branson vows to continue his space tourism venture despite the SpaceShipTwo craft crashing in the US, killing a pilot.
Wannabe is 'catchiest hit single'Results from a citizen science online experiment suggests that the Spice Girls' Wannabe is the UK's catchiest hit single.
Rockets 'destroy chemical weapons'A team has developed micro-sized rockets, powered by seawater, that can neutralise chemical and biological weapons.
WW2 technology 'Plan B' for GPSTechnology developed during World War Two is to be used as a back-up for GPS in ports across England and Scotland.
Newt flesh fungus 'brought by pets'A skin-eating fungus threatens salamanders and newts across Europe, and probably arrived on pet amphibians imported from Asia.
IPCC debates 'most important' reportScientists and government officials are meeting in Copenhagen to edit a report on the causes, impact and solutions to global warming.
Low oxygen 'delayed life on Earth'Animals took so long to evolve and thrive on Earth because of incredibly low levels of oxygen during a period more than a billion years ago, scientists say.
Rocket makers probe US explosionThe builders of an unmanned supply rocket which exploded on the way to the International Space Station have vowed to find the cause of the failure.
New species of frog in urban jungleScientists confirm that a frog found living in New York City wetlands is a new species.
Koala chlamydia vaccine raises hopeAustralian scientists say they have successfully tested a vaccine aimed at protecting wild koalas from chlamydia.
Salt destroying fertile land - UNAbout 2,000 hectares of fertile land are lost each day due to damage caused by salt, according to a UN analysis.
Giant tortoise 'miraculous' recoveryA new study confirms that giant tortoise numbers on one of the Galapagos Islands have bounced back thanks to captive breeding.
Met Office supercomputer confirmedPlans are unveiled for a £97m supercomputer which will boost the Met Office's computing capacity by 13 times, improving weather forecasting and climate modelling.
Google developing a cancer detectorGoogle is attempting to diagnose cancers, heart attack risks and other ailments with a system that combines nanoparticles and a wrist-worn sensor.
Two genes linked with violent crimeTwo genes are associated with repeat violent offenders, according to a genetic analysis of almost 900 criminals in Finland.
Protection plan 'will not save reef'Australia's Academy of Science says a government draft plan to protect the Great Barrier Reef will not prevent its decline.
Key to sounding charismatic revealedAn innate ability some people have to manipulate their vocal frequency could be the key to sounding charismatic, according to new research.
Why scratching 'intensifies itching'Scratching an itch releases serotonin, which paradoxically makes you more itchy, research suggests.
Piece of Australia found in VanuatuA fragment of ancient Australia is found under Vanuatu in the South Pacific, raising new questions about how continents are formed.
Legal fight begins to save beaversCampaigners start legal action to prevent the government from capturing a family of wild beavers.
Monster shark 'kept whales in check'The extinction of the biggest shark known to science may have triggered whales to grow to their current hefty sizes, a study suggests.
Farmland birds show rapid declineFarmland birds are at their lowest levels since records began, according to government figures.
DNA yields secrets of human pioneerDNA analysis of a 45,000-year-old human has helped scientists pinpoint when our ancestors interbred with Neanderthals.
Mystery of giant arm dinosaur solvedTwo dinosaur skeletons have been unearthed in Mongolia, solving a mystery that has baffled palaeontologists for 50 years.
Population controls 'not effective'Attempts to restrict population growth will not solve global sustainability issues in the short term, new research says.
EU leaders agree CO2 emissions cutThe EU agrees what it calls "the world's most ambitious" deal to cut greenhouse gas emissions by at least 40% by 2030, overcoming deep divisions.
'Tree of the Year' shortlist issuedThe 10 trees to make the final of England's "Tree of the Year" competition are announced.
Turtles tracked on swimming frenzySmall tags stuck to the undersides of baby loggerhead turtles are used to follow the animals' frenetic first hours.
Wind farms outstrip nuclear powerThe UK's wind farms generated more power than its nuclear power stations on Tuesday, the National Grid says.
Pesticide bans 'could hit UK crops'The EU's decision to ban the use of some pesticides could threaten UK crops, increase food prices and hit farmers' profits, a report claims.
Threatened birds of prey 'vanish'Two of the rarest birds of prey in England, which had been satellite tagged, vanish in unexplained circumstances.
Hyenas feast at vulture restaurants"Restaurants" of dead meat set up for endangered vultures also attract an undesirable clientele of hyenas and jackals, according to a six-year study.
Brazil releases 'good' mosquitoesBrazilian researchers release thousands of mosquitoes infected with a bacteria that suppresses dengue fever into the environment in Rio de Janeiro.
VIDEO: Russia's 39,000-year-old mammothA 39,000 year-old baby mammoth named Yuka has been put in display in central Moscow making it the best preserved mammoth in palaeontology.
VIDEO: Baby pandas wrestle with their keeperA breeder in China's Chendgu province was trying to give these two baby pandas medicine instead of their usual bamboo leaves- and they were having none of it.
VIDEO: Lab for world’s worst animal virusesA look around a new lab at Pirbright Institute in Surrey, where the world’s most contagious livestock viruses will be kept.
VIDEO: Moment unmanned rocket explodesAn unmanned cargo rocket has exploded seconds after lifting off from a commercial launch pad in Virginia.
VIDEO: 1000C lava reaches homes in HawaiiA lava flow from the Kilauea volcano on Hawaii's Big Island is now drawing close to homes.
VIDEO: App aims to identify bird songsA mobile phone app that recognises which species of bird is singing is being developed by a researcher at Queen Mary University in London.
VIDEO: Wild flowers targeted by thievesConservationists are warning that some of Britain's endangered plants are being put under even greater threat, because thieves are stealing them to order.
VIDEO: New supercomputer for Met OfficeFunding has been confirmed for a £97m supercomputer to improve the Met Office's weather forecasting and climate modelling.
IPCC keen to avoid old ghostsClimate talks stalked by spectre of the past
Is the traditional metal key becoming obsolete?Keys are 4,000 years old but are their days numbered?
In pictures: Relics found in MexicoAncient Mexican city yields 50,000 treasures
How will future city signs look?How jetpacks and driverless cars will change the cityscape
VIDEO: The island disappearing into the seaThe story of two families and one fragile Louisiana wetland
The high-stakes world of rare-plant theftThe high-stakes world of botanical crime
Baffling balletCan science explain the flocking habits of starlings?
10 things you may not know about laughter10 things you may not have known about being amused
Bloodhound Diary: Putting it all togetherInto the assembly of the world's fastest car
Australia green firms hit by cutAustralia's green energy firms hit by target cuts
Autumnwatch returns to Leighton MossStags, starlings and more turn out for Autumnwatch
Egyptian obelisk revealed anewEgyptian hieroglyphs seen in a new light

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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/

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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.

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