::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
MPs: Ban fracking on carbon groundsA committee of MPs has called for a moratorium on shale gas fracking on the grounds that it could derail efforts to tackle climate change.
Eyes on Pluto for historic encounterNasa's mission to Pluto gets under way in earnest as the New Horizons probe starts taking the pictures needed for July's close fly-by.
Jellyfish 'can sense ocean currents'A jellyfish tagging study reveals the creatures' ability to swim against the current when forming their submarine swarms, say researchers.
Scientists slow the speed of lightA team of Scottish scientists make light travel slower than the speed of light by changing the shape of photons.
Comet shows off its 'goosebumps'Scientists working on Europe's Rosetta mission say they may have found evidence for how comets are formed.
Ebola vaccine 'shipped to Liberia'The first batch of a vaccine against Ebola is on its way to Liberia and trials are expected to start soon.
New record for SA rhino poachingThe number of rhinos killed in South Africa last year sets a new record, officials say.
Satellite system targets 'dark fish'A UK-developed smart application that incorporates satellite and other data is tracking illegal fishing on the high seas.
Meteorite is 'hard drive' from spaceResearchers have decoded ancient recordings from fragments of an asteroid dating back billions of years to the start of the Solar System.
'Safer GMOs' made by US scientistsUS scientists say they have taken the first step towards making "safer" GMOs that cannot spread in the wild, using synthetic biology.
Laser-etched metal 'bounces' waterBy etching grooves into metal with a high-powered laser, physicists create a surface that repels water to the extent that droplets bounce away.
X-rays read burnt Vesuvius scrollAn X-ray scanning technique allows physicists to read letters from a fragile, burnt scroll dug from beneath Mount Vesuvius - without unrolling it.
Google robot severs its power cordAtlas - one of the most advanced robots in the world - is upgraded by its owner Google to include a battery pack, allowing it go "wireless".
Soviet collapse felt among wildlifeThe socioeconomic shocks following the collapse of the Soviet Union also affected the region's wildlife, a study suggests.
First transplant from UK newbornDoctors have carried out the first organ transplant from a newborn in the UK, giving a dead baby's kidneys and liver cells to two separate recipients.
Malaria resistance genetics revealedGenetic mutations that are associated with resistance to the frontline malaria drug are identified, scientists report.
Lost Beagle2 probe found on MarsHigh-resolution images taken from orbit identify the landing location of the lost Beagle2 probe, and it appears to be in one piece.
'Designer baby debate should start'Rapid progress in genetics is making "designer babies" more likely and society needs to be prepared, leading scientists have told the BBC.
Global soil hunt for new drugsUS scientists are asking the public to send in soil samples that can be screened for compounds that could be used to make vital new drugs to fight deadly infections and cancer.
Micro-machines journey inside animalIn a case of science fiction meeting reality, microscopic machines have journeyed inside a living animal for the first time.
Disease threat to wild beesThe trade in bees used for honey or to pollinate crops could have a devastating impact on wild bees and other insects, say scientists.
2014 confirmed as warmest on recordThe 12 months of 2014 were the warmest on record, with global temperatures 0.68C (1.24F) above the long-term average, say US government scientists.
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: Ancient underwater forest found off UKBBC Inside Out reveals a 'lost world' with the discovery of a remarkable submerged forest thousands of years old underneath the sea off eastern England.
VIDEO: The big changes in British birdlifeRSPB Big Garden Birdwatch gets under way with thousands of people expected to record bird sightings in their gardens.
VIDEO: Rat eradication ship sets sailA conservation team in the final phase of a mission to eradicate rats from South Georgia sets sail from the Falkland Islands.
VIDEO: Icy mystery: Pluto ready for close-upThe US space agency's mission to Pluto is about to take its first pictures of the mysterious icy world.
VIDEO: Killer whale could be set freeIn the next few days the authorities in the United States will decide whether to put killer whales on the list of endangered species.
VIDEO: Manhole explosion just misses childAn explosion in a manhole on a Birmingham street "just missed" a child who was walking nearby.
VIDEO: Jellyfish swimming secrets revealedJellyfish tagging study reveals the creatures' ability to swim against the current, researchers say.
VIDEO: Northern White rhinos facing extinctionNorthern White rhinos are on the edge of extinction with just five of them left in the world, but conservation experts are trying to find ways to save them.
Winston Churchill's passion for scienceCharting Winston Churchill's passion for research
Rat-eradication mission sets sailEradicating rats from South Georgia to reclaim it for its seabirds
Poor outlook for Borneo's mammalsThe threats to unique mammals of Borneo
Why India should not get complacent over its tiger populationIndia must not get complacent about its tiger recovery
GM crops: What do new rules mean?What do the new rules mean?
'Planet' Pluto comes into viewThe little world is finally about to come into view
Should tourists be banned from Antarctica?Should tourists be banned from visiting the Antarctic?
In search of a personalised dietDo obese people have slower metabolisms?
VIDEO: Deadly snakes aid medical researchHow milking snake venom could save thousands of lives

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To cite Wessa.net in publications use:
Wessa, P. (2015), 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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