::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
Tree-hugging snakes put safety firstFor the first time, biologists measure the force applied by climbing snakes and find that they squeeze up to five times harder than necessary.
Camouflage sheet inspired by octopusBasing their work on the techniques used by octopuses and cuttlefish, US engineers have produced a flexible, colour-changing material.
Iceland raises volcano alert levelThe risk of an eruption at Iceland's Bardarbunga volcano has increased, as well as the risk level to the aviation industry, meteorologists say.
Elephant deaths reach tipping pointAfrica's elephants have reached a tipping point, where more are being killed each year by poachers than are being born, a study suggests.
Vanishing canyon has 50 years leftA gorge in Taiwan, cut through rocks raised by a 1999 earthquake, is disappearing at an unprecedented rate, along with geological evidence.
Richard III 'drank a bottle a day'Research into Richard III's bones and teeth reveals the last Plantagenet king drank about a bottle of wine a day in the last years of his reign.
River turtle mothers 'talk' to youngAmazon river turtles communicate with their hatchlings and with one another using vocalisations, recordings reveal.
SeaWorld to redesign its whale tankThe US marine park SeaWorld is to build a new killer whale enclosure as criticism grows over how the park handles the animals.
Magpies 'don't steal shiny objects'Science dispels the popular myth that magpies like to steal shiny objects for their nests.
Beetles' whiteness understoodScientists discover the secret behind the super-white shells of some beetles.
Exotic grains from cosmos identifiedScientists may have identified the first known dust particles from outside our Solar System, in samples returned to Earth by a Nasa space mission.
Smell of dollars may catch smugglersA probe that sniffs the aroma of dollars is being developed to help US-Mexico border police catch smugglers.
Maths helps find climate-proof cropsResearchers are developing mathematical models to help identify genetic material that could improve food crops' resilience to climate change.
Mosaic image reveals Martian gloryScientists in Germany have pieced together a stunning mosaic image of the Martian surface.
Child's drawing 'predicts intellect'A study suggests the way children draw at the age of four can be a predictor of intelligence 10 years later.
Pentagon researches hi-tech tankThe research arm of the US military is looking into designs for new, hi-tech tanks, focusing less on armour and more on mobility and speed.
Sweat-powered 'phone battery' madeA battery tattoo powered by perspiration has been unveiled by chemists in California.
Rosetta: Comet probe starts workA week after arriving at Comet 67P/Churyumov-Gerasimenko, Europe's Rosetta probe is busy acquiring the information needed to select a landing site.
'Doctor of chocolate' post on offerSweet-toothed scientists can apply for a "multidisciplinary PhD on chocolate" at the University of Cambridge.
Record high for university placesA record number of students have had their university places confirmed, figures from admissions body Ucas show.
Chile quake hazards remain highScientists say the potential remains for further big earthquakes in North Chile, along the stretch of coast hit by a Magnitude 8.2 tremor in April.
First female winner for maths medalIranian mathematician Prof Maryam Mirzakhani becomes the first woman to win a Fields Medal at a ceremony in Seoul, South Korea.
Giant Amazon fish 'locally extinct'A 10 foot long fish which used to dominate the Amazon river has been fished to extinction in a number of areas, a new study shows.
GM flies 'could save crops'A type of genetically engineered fly which eventually kills itself off can be an effective method of pest control, according to new research.
Rising economies 'ahead on climate'Four of the world's emerging economies have claimed that they are far ahead of developed countries in their efforts to slow climate change.
Sheep rustling boosts rural crimeRural crime is rising, with a spate of sheep rustling and an increase in the theft of farming tools, vehicles and fuel driving up the figures.
EDF shuts two nuclear power stationsElectricity company EDF temporarily shuts down two of its nuclear power stations, Heysham 1 and Hartlepool.
Sea meadows 'lost like rain forests'Under sea feeding grounds for young fish are being lost at the same rate as Amazonian rain forests and could damage the fishing industry, scientists in Swansea warn.
Crocodile kills Australia fishermanA man is killed by a giant saltwater crocodile as he fished with his wife in northern Australia - the fourth fatal attack this year.
Rare birds attempt to nest in UKTwo rare birds usually found in the Mediterranean region are spotted building a nest at a nature reserve in Lincolnshire.
'Mammoth' returns to 'walk' on coastA replica mammoth is walked along a beach in Norfolk retracing the steps of its extinct ancestors that roamed the area more than 700,000 years ago.
VIDEO: Russian cosmonauts go on spacewalkTwo Russian cosmonauts set off on a spacewalk from the International Space Station (ISS) to launch a nano-satellite.
VIDEO: Africa's elephants in net declineA new study suggests the number of Africa's elephants has declined to a critical point.
AUDIO: Jupiter and Venus light up morning skyThe two brightest planets, Jupiter and Venus, are currently aligned in the sky, forming a spectacular "double star" in their closest conjunction since 2000.
VIDEO: Dolphins squeal with delightA study of trained dolphins has suggested that the marine mammals use express pleasure with squeals of delight.
VIDEO: Extinct mammoth 'walks on beach'A "mammoth" that last walked on the Norfolk coast more than 700,000 years ago returns to the beach.
AUDIO: Is 'the thieving magpie' just a myth?New research suggests that the idea of "the thieving magpie" being attracted to shiny objects may be a myth.
VIDEO: Is politics risking space projects?Collaboration between the US and Russia on the International Space Station (ISS) could be jeopardised as tensions between the two nations create political disputes.
VIDEO: Two US states 'swap weather systems'Unusual weather in the Western US has caused an apparent "swap" in weather systems between Arizona and Washington State.
Can eating meat be eco-friendly?Which is the best eco option - eating beef, chicken or mussels?
Robot swarm shuffles into formationRobot swarm builds two-dimensional shapes in lab
How much gold can we get from mobile phones?How much of the gold we need can we get from recycled phones?
The village 'washed on to the map'Why villagers think Boscastle floods were a good thing
A looming crisis in space?How does Ukraine crisis affect US-Russian co-operation in space?
Kew's green medicineThe stimulating, healing - but also potentially harmful - power of plants
UK satellite's view of Planet EarthUK satellite captures video of Planet Earth
The 30-year-old health billionaireThe self-made 30-year-old health care boss who's worth $4.5bn
In pictures: Top trunksThe search for England's "Tree of the Year"
Silchester dig ends after 18 yearsOne of Britain's longest running archaeological digs comes to end
Bloodhound Diary: Super-wheelsMaking super-wheels for a 1,000mph car
Ethics: Resolving the Ebola dilemmaWhat are the ethics of using experimental treatment drugs?

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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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