::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
Cave yields Neanderthal 'artwork'An engraving found at a cave in Gibraltar may be the most compelling evidence yet for Neanderthal art.
Xenon and argon banned for athletesDoping experts have yet to find an effective test to uncover athletes using the gases xenon and argon to boost performance, as a ban is introduced.
African food security on the menuAfrican ministers and business leaders gather in Ethiopia to consider ways to trigger a green revolution and improve the continent's food security.
Antarctic waters 'rising faster'Melting ice is fuelling sea-level rise around the coast of Antarctica, a new report finds.
Greenhouse gas fear over meat eatingNew research estimates greenhouse gases from food production will go up 80% if meat and dairy consumption continues to rise at its current rate.
Iceland issues new volcano alertIceland issues an aviation alert after a fresh lava eruption from a fissure near the Bardarbunga volcano, but the warning is later lowered.
Legal challenge to badger cull failsA High Court bid to halt this year's badger culling, which will take place without independent monitoring, fails.
DNA tells story of Arctic peoplingA study of genetic sequences sheds light on the settling of the North American Arctic, from ancient "Paleo-Eskimos" to the modern-day Inuit.
UN seeks climate change 'Malala'Five hundred people will learn tomorrow if they have won the chance to vent their frustration at world leaders over the global citizens stalemate over climate policy.
Genetic clues to spread of EbolaScientists have tracked the spread of Ebola in West Africa, revealing genetic clues to the course of the outbreak.
Dead stars 'can re-ignite' and blowAstronomers have shown that dead stars known as white dwarfs can re-ignite and explode as supernovas.
A sheepdog's 'two rules' for successScientists produce a simple mathematical model that explains how a single sheepdog can herd a large number of sheep.
Global coal 'binge' missed in dataThe climate impacts of the world's fossil-fuelled power plants are being underestimated because of poor accounting, say researchers.
Magnetic levitation in 3D advancesHarvard researchers develop a system to orientate small objects in any direction using magnetic levitation.
Scientists solve 'sliding rocks' puzzleScientists have finally worked out how rocks on a dry lake bed in California move across the ground.
Memories 'flipped' from bad to goodNeuroscientists artificially turn a mouse's fearful memory into a positive one, and vice versa.
Row over polish to detect 'rape drug'Rape-prevention tool draws online backlash from anti-rape advocates
Potential comet landing sites chosenEurope's Rosetta mission, which aims to put a robot on a comet in November, has identified five potential sites for the touchdown.
Whole organ 'grown' in world firstA whole functional organ has been grown from scratch inside an animal for the first time, say researchers in Scotland.
Galileo satellites on wrong orbitThe European Space Agency says the latest two satellites for Europe's version of the US GPS sat-nav system have not gone into the correct orbit.
MH370 search faces tough next phaseThe next part of the hunt for the missing Malaysia Airlines jet MH370 will be very challenging in places, sea-floor mapping data suggests.
Lockheed Martin in space junk dealUS defence giant Lockheed Martin is teaming up with an Australian technology firm to track space debris that can damage multi-billion dollar satellites.
Woman finds 3ft wasp nest on bedA pest controller takes on the "biggest job of his career" when he is called to deal with a nest of more than 5,000 wasps.
World's rarest bird needs new homeThe last remaining population of the world's rarest bird, the Madagascar pochard, needs a new wetland home if it is to thrive again, a study reveals.
Methane vents bubble up off US coastResearchers say they have discovered more than 500 bubbling methane vents on the seafloor off the US east coast.
Stench of decay turns coral awayBaby coral and fish can smell the difference between good and bad reefs, say marine ecologists.
Seals 'brought TB to the Americas'Marine mammals brought tuberculosis to the Americas before the Europeans arrived, a study suggests.
Urban areas are hives for wild beesA study finds a "considerable richness" of bee species in urban habitats, suggesting cities could help maintain healthy populations of the vital pollinators.
Rare antelope births 'fantastic'The birth of a pair of rare bongo antelopes in captivity is "fantastic news" for the "critically endangered" species, say conservationists.
Badger cull targets are announcedA target number of badgers to be killed in this year's pilot cull to tackle tuberculosis in cattle is announced.
Rare species found in marine studyDivers discover rare species of marine life such as stalked jellyfish and squat lobsters in a study of Somerset's Porlock Bay.
VIDEO: Footage of powerful solar flaresThe US Space Agency Nasa has released new footage showing a series of powerful solar flares.
VIDEO: RSPCA seeks ban on monkeys as petsThe RSPCA is calling for a ban on keeping primates as pets after a rise in the number of calls to its cruelty and advice line concerning animals such as monkeys and marmosets.
VIDEO: Greenhouse gas fear over meat productionGlobal consumption of meat needs to fall to ensure future demand for food can be met and to help protect the environment, a study says.
VIDEO: 100-year-old tortoise is on the moveAn extremely rare Galapagos tortoise thought to be 100 years old has been given a new home at a zoo in Ohio.
AUDIO: Global citizens to address climate summitFive hundred global citizens frustrated at the stalemate over climate policy will learn today if they have won the chance to vent their anger at world leaders.
VIDEO: Litter bug mountaineers 'must recycle'Over the decades tonnes of disposed tents, spent oxygen cylinders and bottles have been left behind on Mount Everest by people trying to scale it. Now authorities are urging them to bring the waste back down with them to recycle it.
VIDEO: Scientists trial knotweed killersSwansea University scientists are conducting the largest field trial in Europe to find new ways of killing Japanese knotweed.
AUDIO: Puffins 'Frankie Howerd of bird world'A study by the National Trust suggests seabirds around the UK coastline are being hit by a "triple whammy" of extreme weather, predators and disturbance by humans.
The girl with three biological parentsThe girl with three biological parents
Mouse on lily tops photo competitionAnimal nightlife - and other great images from photo contest
VIDEO: Teaching children to be engineersThe summer school teaching children to be young engineers
'Antarctic audit' for marine lifeNew atlas catalogues 9,000 Southern Ocean species
TV white space could be a lifesaverCould unused TV signal improve rural broadband?
Sniffing out the allergy epidemicWhy so many of us are developing allergies
Warning over electrical brain stimulationWarning over electrical brain stimulation
UK air pollution fuels official concernMeasuring and tackling an invisible killer
Study creates 'virtual time travel'Using virtual reality to 'go back in time'
Fence to stem human-elephant conflictSri Lanka tree barrier could prevent conflict
Galileo: We know where you areWhat pinpointing positions on the planet could mean for you
Antarctic hides extreme ecosystemAn ecosystem thrives in the freezing Antarctic underbelly
Can eating meat be eco-friendly?Which is the best eco option - eating beef, chicken or mussels?
The economic impact of EbolaHow Ebola crisis has affected West Africa's economies
VIDEO: Could this man help save the world?UK man keeps eye on dangerous asteroids

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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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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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