::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
Dawn probe achieves Ceres orbitNasa confirms that its Dawn probe has gone into orbit around Ceres, the largest object in the asteroid belt between Mars and Jupiter.
Pop-up playgrounds fold themselvesUS researchers build tiny electronic scaffolds using a new technique aimed at merging biology with electronics.
Science 'squeezed out of primaries'Science is being squeezed out of English primary schools, with a third not providing the recommended two hours of teaching a week, research suggests.
Outcry as IS 'wrecks' Assyrian siteArchaeologists and officials express outrage about the reported bulldozing of the ancient Assyrian city of Nimrud in Iraq by Islamic State (IS) militants.
DNA reveals bird shift surpriseDNA samples reveal two species of forest-dwelling birds on remote Indonesian islands are actually members of the ground-dwelling pipit and wagtail family.
Global flood toll to triple by 2030People affected by river flooding worldwide could triple by 2030, with climate change and population growth the main factors, says a new report.
African synchrotron bid gathers paceThe effort to build a synchrotron - a large accelerator that generates X-rays for research - in Africa is gaining momentum, a US conference hears.
'First human' discovered in EthiopiaScientists working in Ethiopia have uncovered a jawbone fossil which may push the origin of humans back 400,000 years.
Autism appears 'largely genetic'Genetic influences on autism are estimated to be between 74-98%, a Medical Research Council study of 258 twins suggests.
Magic 'metamaterials' storm physicsThe hot topic at a major US conference is materials that can be designed with surprising properties, from programmable rubber to springy ceramics.
Stegosaurus gives up body weightScientists work out the body mass of the superb Stegosaurus specimen recently put on display at London's Natural History Museum.
New threats to wild bees identifiedWild bumblebees are infected with many of the diseases found in honeybees looked after by bee keepers, according to a national survey.
Kew cuts 'a recipe for failure'The government's financial management of Kew Gardens is a "recipe for failure", a Select Committee report warns.
Scientists produce TB-resistant cowsResearchers in China produce a herd of genetically engineered cows that are better able to ward off bovine TB.
Coffee linked to 'cleaner' arteriesDrinking a few cups of coffee a day may help people avoid clogged arteries - a known risk factor for heart disease - South Korean researchers believe.
New Higgs detection 'closes circle’Physicists have detected a version of the Higgs Boson in a superconductor, but say this cannot substitute for the work of the LHC.
Rosetta catches its own shadowThe Rosetta satellite sees its own shadow in the highest resolution image it has so far taken of Comet 67P.
Bloodhound car begins to take shapeGood progress is being made on construction of the world's fastest car - the Bloodhound supersonic vehicle, which aims to run at over 1,000mph.
Google camera zips along rainforestGoogle flew one of its Street View cameras down a zip wire in the Amazon rainforest to capture new images of the forest canopies.
UK to pioneer lagoon power plantsPlans to generate electricity from the world's first series of tidal lagoons are unveiled in the UK, with sites proposed in Wales, Somerset and Cumbria.
Power plants paid to stay idle - MPsThe Energy and Climate Change Committee has warned that a government scheme to keep the lights on could lead to unnecessarily high energy costs.
First tree seeds for Doomsday vaultThe Svalbard "Doomsday" seed vault, which protects the world's food crops, accepts its first consignment of seeds from forest tree species.
Lords call for UK Arctic ambassadorThe United Kingdom should create an ambassador for the Arctic or risk being pushed out of key decisions for the region, a House of Lords report says.
VIDEO: New threats to wild bees identifiedBumblebees in the wild are infected with many diseases found in honeybees kept by bee keepers, according to a national survey.
VIDEO: Talking Movies: How Greenpeace beganTalking Movies' Tom Brook meets the director of the documentary How to Change the World - a film which focuses on the early days of Greenpeace.
VIDEO: The greatest threat to China's elephantsThe greatest threat to China's wild elephants is no longer poaching but habitat destruction.
VIDEO: Prince's call to end ivory tradePrince William condemns illegal wildlife trading in a speech on the final day of his tour of China.
VIDEO: MPs' warning over Kew Gardens cutsThe government's financial management of London's Kew Gardens is "a recipe for failure", MPs warn.
VIDEO: 'How I snapped weasel on bird photo'The amateur photographer who took a picture of a weasel on the back of a woodpecker mid-flight says it is "almost a dream".
VIDEO: Dramatic volcanic eruption in ChileThe Villarrica volcano in southern Chile has erupted, spewing ash and lava up to 1,000m (3,300ft) into the air.
LHC restart: 'We want to break physics'The world's biggest machine powers up again
Bloodhound Diary: 'Blink and you'll miss it'How fast? Just blink and you'll miss it
MH370: Behind the tenacious deep-sea hunt for missing planeThe team scouring the ocean floor to find MH370
Lucky Earth survived cosmic pinballHow Earth survived through violent times
Weasel rides on woodpecker's backThe weasel riding on the back of a woodpecker
How do you solve a problem like the 'Beefalo'?The hybrid animal causing havoc in the Grand Canyon
Are humans getting cleverer?Are people getting more intelligent?
Nuclear power: The future or the past?Has nuclear power really had its day?
The man who invented the dinosaurRemembering the man who invented the dinosaur
Is the world ready for GM animals?Is the world ready for modified mosquitoes?
Waiting for the seaThe desert that may one day become water again

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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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