::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
'Wrong type of trees' boost warmingScientists say replacing broadleaved species with conifers over the past two centuries has increased global temperatures.
Sixth man on Moon Edgar Mitchell diesUS astronaut Edgar Mitchell, who was the sixth man to walk on the Moon and had an "epiphany" in space, dies at the age of 85.
Bears hibernate 'with bacterial help'A Swedish study suggests that changes in the gut flora of brown bears help them to cope with the weird metabolic demands of hibernation.
Spread of bee disease 'largely manmade'The global honeybee trade is driving a pandemic that threatens hives and wild bees, according to a study.
New tarantula named after Johnny CashAmong 14 newly described species of tarantula is Aphonopelma johnnycashi, which lives near Folsom Prison in California.
New rainforests boost carbon captureSecondary rainforests - if allowed to flourish in the right conditions - can absorb 11 times as much carbon as old-growth rainforests, a study shows.
Colombia warns on Zika baby riskHealth officials in Colombia are warning that as many as 600 babies could be born with microcephaly this year.
Paris deal could 'displace millions'A global deal to limit emissions of carbon dioxide could make millions of forest dwellers homeless, according to a new analysis.
Mystery of 'sock of the deep' solvedA decades-long mystery of a deep-sea creature that resembles a discarded purple sock has been solved, scientists say.
Luxembourg to support space miningThe Luxembourg government has signalled its intention to get behind the 'next industrial revolution' - the mining of asteroids in space.
Supersonic car bid delayed until 2017The attempt to break the world land speed record with the Bloodhound 1,000mph car has been put back again, to 2017, because the funding is not yet in place.
Black hole's twin jets shine brightAstronomers capture images of two vast, bright jets of material, fired into space in opposite directions by a distant black hole.
MoD to buy high-flying solar planesThe UK Ministry of Defence is going to acquire some high-altitude "eternal" solar planes.
Logging 'speeds black rats invasion'Cutting down trees in rainforest regions facilitates the spread of invasive black rats, a study suggests.
Sea lion found in San Diego restaurantA hungry sea lion pup is rescued after finding its way into a restaurant in the US city of San Diego.
Brain wrinkles replicated in a jarScientists recreate the furrows of a human brain using a simple two-layered gel model, showing that the brain's folds have physical origins.
'Early warning sign' for volcanic eruptionsScientists edge closer to better monitoring of volcanoes, with research suggesting volcanoes are primed to erupt on a time scale of days to months rather than years.
Tackle cold homes, ministers toldInsulating buildings should be a key infrastructure priority alongside roads, rail, flood defences and energy, ministers have been told.
UK greenhouse gas emissions' 8% dropGreenhouse gas output in the UK fell almost 8% in 2014, although emissions from transport and agriculture rose slightly, official figures show.
VIDEO: Meet the mysterious deep-sea 'sock'The mystery of a deep-sea creature that resembles a discarded purple sock has been solved, scientists report.
VIDEO: WHO warns Zika could infect millionsThe World Health Organisation has convened an emergency committee to discuss the spread of the Zika virus, which has been linked to thousands of birth defects in Latin America.
VIDEO: Copying the brain's origami using gelScientists replicate how the human brain folds using a 3D model made out of gel, and computer simulations.
VIDEO: Bite by bite: Shark eats sharkA female sand tiger shark has slowly eaten a smaller male shark in a Seoul aquarium, bite by bite
VIDEO: Chris Packham on polecat comebackPolecats, which were almost wiped out in Britain in the last century, have made a remarkable recovery. Naturalist Chris Packham explains.
VIDEO: Inside Russia's new space portWork is nearing completion on building Russia's new Vostochny space port, designed to replace the Baikonur launch facility in Kazakhstan.
VIDEO: Penguin diary: Charting a year in the lifeVictoria Gill joins a team of scientists as they set up remote cameras to observe penguin colonies in the Antarctic.
VIDEO: 'Ninja eagle' kicks like a muleUK researchers measure the power in the strike of the secretary bird, which hunts by kicking.
Winning photos from beautiful gardensWhat is the most beautiful garden photo of the year?
Are humans driving evolution in animals?Is human activity driving evolution in animals?
Stephen Hawking’s second Reith Lecture: Annotated transcriptMore on black holes, from Stephen Hawking's second Reith Lecture
Bloodhound Diary: How fast is your car?The challenge of setting a mini land speed record
Challenger and the misunderstanding of riskHow the misunderstanding of risk destroyed a shuttle
The country that supplies eyesThe country that donates eyes to the rest of the world

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To cite Wessa.net in publications use:
Wessa, P. (2016), 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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