::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
Call for end to 'throwaway society'A ban on sending leftover food to landfill is needed to move away from a 'throwaway society', say MPs.
Government to end nuclear waste vetoThe UK government wants to scrap a community veto which allows local politicians to block a future £12bn nuclear waste repository.
Carbon concerns over wood burningBurning wood to fuel power stations can create as many harmful carbon emissions as burning coal, according to a government report.
Rosetta's comet seen in close-upEurope's Rosetta probe has acquired new images of the comet it is chasing through space.
Nasa seeks aid with Earth-Mars linksNasa is asking for help to get data back from future science missions orbiting Mars or roaming its surface.
Genetic clues to age of first periodThe timing of when a girl reaches puberty is controlled by hundreds of genes, say scientists.
Dogs 'hardwired' to be jealous wagsJealousy is not just part of the human condition, a study suggests, it appears to be hard wired into the brains of dogs too.
Fur seals feel climate impactsChanges in the Antarctic climate are showing up in the fur seal population, say scientists who have studied the animals for 30 years on the British Overseas Territory of South Georgia.
Voyage to unlock Arctic secretsA crew of sailors is embarking on a pioneering citizen science expedition through the Northwest Passage between Canada and Greenland.
EU sets 30% energy savings targetMembers of the European Union will have to boost their energy efficiency by 30% by 2030, according to the European Commission.
Bats 'fly by polarised light'Zoologists find that bats use the pattern of polarised light in the sky at sunset to help them navigate.
Deep sea mining licences issuedThe UN's seabed authority issues exploration licences that accelerate a search for valuable minerals on the ocean floor.
Quarantine over China plague deathPart of a city in north-west China is sealed off and dozens of people placed in quarantine after a man died of bubonic plague, state media say.
Three person IVF plans 'progress'A public review into the three person IVF technique has been broadly supportive, says the Department of Health.
Beef's greater environment burdenA new study says the production of beef is around 10 times more damaging to the environment than any other form of livestock.
Secret of sandstone shapes revealedGeologists discover that the stress applied by gravity is what controls the shape of dramatic sandstone landmarks.
Four-winged dinosaur found in ChinaThe largest ever four-winged dinosaur has been discovered in China, with remarkably long feathers on its hindwings and tail.
Kepler sees world with distant orbitThe Kepler Space Telescope has spotted a distant world with the longest year of any planet in the mission's inventory.
Aids researchers on crashed planeAt least six passengers on the Malaysia Airlines plane were heading to a major international Aids conference in Australia.
UK space shot's tribute to NewtonBritish astronaut Tim Peake has picked "Principia" to be the name of his mission into space next year.
'Biological pacemaker' tested in labGrow-your-own pacemakers are a step closer to reality, after pioneering experiments in pigs.
Rosetta heads for 'space duck'Europe's mission to land on a comet was always going to be difficult, but the pictures released this week of the giant ice ball illustrate just how daunting the task will be.
Scientists develop robotic fingersA group of MIT scientists announces the development of supplementary fingers controlled by sensors attached to the human hand.
Seals 'feed' at offshore wind farmsSome seals prefer to forage for food at offshore wind farms, UK study suggests.
Software can decode bird songsScientists have developed a highly advanced bird song decoder, which can automatically identify the call of a vast variety of birds.
Australia votes to repeal carbon taxAustralia's Senate votes to repeal the so-called carbon tax, a levy on the biggest polluters brought in by the Labor Party.
Twitchers flock to glimpse rare birdHundreds of bird-watchers flock to the Norfolk coast in the hope of catching a rare glimpse of a migratory great knot in British waters.
Climate-sceptic charity to be splitA climate-sceptic group founded by former Conservative Chancellor Lord Lawson is to relaunch after a complaint about its charitable status.
Dolphin attacks on bay porpoisesDolphin attacks on porpoises in Cardigan Bay leave marine scientists scratching their heads.
Two rare Amur leopards born at zooA pair of Amur leopards, which zookeepers say are on the brink of extinction, are born at Leicestershire's Twycross Zoo.
Two bee swarms hit town in one dayA Powys councillor tells how she photographed two swarms of bees in Newtown on the same day.
Sea turtle migrates 2,472 milesA green sea turtle migrated a staggering 3,979 km (2,472 miles) in a year, according to Swansea University researchers.
VIDEO: Seals 'stressed' by warming seasWarming seas are reducing the food supply for Antarctic seals, say researchers.
VIDEO: Drones homing in on wildlife poachersCivilian drones are being tested across Africa's game reserves in a hi-tech battle with poachers threatening the continent's wildlife tourism industry.
VIDEO: 'Depressed' polar bear not movingArturo, the polar bear dubbed 'the world's saddest animal', will be staying at his zoo in Argentina, despite a massive petition calling for him to be moved to a colder climate.
VIDEO: Scientists survey jellyfish after boomMore and more jellyfish are being spotted on the UK's coastline during the summer months, and now scientists have decided to try and find out why.
AUDIO: Warm weather boosts slug numbersThere has been an increase in the number of slugs in Britain's gardens due to the warm and damp weather.
VIDEO: Loris success in Sri LankaThe Loris, one of world's smallest primates is under threat through loss of habitat. Naturalist Chaminda Jayasekara runs a conservation site to protect the animals.
VIDEO: Troubled Glasgow tower reopensThe Glasgow Science Centre tower has reopened to the public after being closed for almost four years.
AUDIO: How to count butterflies for scienceSir David Attenborough has urged the public to look for butterflies as part of the Big Butterfly Count
Row over 'bonkers' EU energy planEuropean spat over energy savings target
VIDEO: Who was that man on the moon?Why the US public quickly lost interest in lunar exploration
Do butterfly wing patterns really mimic predator eyes?Do butterfly wing patterns really mimic predator eyes?
Giant python gets a health checkEnormous reticulated python gets annual check-up
Dream Cars: Innovative Design, Visionary IdeasModels and conceptual drawings by famous car manufacturers
Climate change shuttle diplomacyUK Climate Secretary travels world in hope of paving way for emissions deal
The virus detective who discovered EbolaThe young medic who discovered the deadly Ebola bug
Pushing frontiers of deep sea explorationOcean exploration is going further than ever
The beaches where Lego keeps washing upThe beaches where Lego keeps washing up
Captured carbon to feed farmed fish?Carbon dioxide turned into food for farmed fish
Europe's combat drone challengeEurope develops advance unmanned combat planes
VIDEO: Rare blue butterflies given fresh hopeOne of Britain's rarest butterflies is given a new home
Spaceport Britain: 'No challenge is insurmountable'Can we really have a spaceport in Britain by 2018?
How much science in new Planet of the Apes film?Is there any science behind Planet of the Apes?

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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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