::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
Barrier Reef spared 'danger' listingThe Great Barrier Reef should not go on the World Heritage danger list, according to a United Nations draft report.
Alloy bounces back 10 million timesEngineers produce a "shape memory alloy" that can pop back into shape more than 10 million times, shattering previous records for this type of material.
Black hole seen 'playing billiards'A series of images captures two vast blobs of plasma, shot out by a black hole, cannoning into each other in a nearly light-speed cosmic collision.
'Man-eating tiger' to stay in zooA court in India's Rajasthan state rejects a plea to release a tiger who has been branded a killer and caged.
Earliest evidence of human violenceA human skull from a deep cave in northern Spain shows evidence of a lethal violent attack 430,000 years ago, a study shows.
'New species' of ancient human foundA new species of ancient human has been unearthed in the Afar region of Ethiopia, scientists report.
Food bug 'found in 73% of chickens'Nearly three-quarters of fresh shop-bought chickens test positive for food poisoning bug campylobacter in year-long study.
Robots adapt to damage in secondsResearchers develop a system that adapts to damage in less than a minute, paving the way for robots in the home.
Mice in space develop thin skinA study of three mice that spent 91 days on the International Space Station finds abnormalities in their skin.
Crowd size estimated with phone dataA study tests the idea that large crowds can be counted using data from mobile phone usage and Twitter.
Nepal seeks expert advice on tourismTourism operators in earthquake-hit Nepal seek guidance from international experts on which areas can be declared safe for trekking and mountaineering.
How Arctic ozone hole was avoidedThe Antarctic ozone hole would have been 40% bigger and a hole over the Arctic would have opened up if ozone-depleting chemicals had not been phased out, according to research.
Fish fossils found by 'creationist'A man from Calgary reported to be a committed creationist finds five fish fossils dating back 60 million years whilst digging a basement.
US-China tensions rise over Beijing's 'Great Wall of Sand'The US is expected to have tough words with China at a regional security meeting, over Beijing's building activities in the South China Sea, says Jonathan Marcus.
Cold sore virus 'treats skin cancer'A genetically engineered version of a virus that normally causes cold sores shows real promise for treating skin cancer, say researchers.
Ramakrishnan to lead Royal SocietyNobel-winning structural biologist Venki Ramakrishnan is elected to become the next president of the Royal Society.
Tiger-tagging app to boost trackingA new iPad app is asking users to "tag" tigers in images gathered from the internet, to help researchers with counting and tracking the animals.
Europe drops asteroid sampling ideaEurope will not be mounting a sample-return mission to an asteroid, having rejected the MarcoPolo concept at the third time of asking.
Ministers challenged over CO2 cutsThe UK government’s claim that the country leads the world in cuts of carbon emissions is challenged by researchers at Leeds University.
Huge marine reserve for PitcairnThe UK government is to establish the largest marine reserve in the world around the Pitcairn Islands in the Pacific.
Mercury pollution risk to Arctic gullMercury pollution has risen nearly 50-fold in the feathers of a gull that feeds and breeds in the Arctic, say scientists.
Tidal lagoon 'negotiations open'Negotiations are opening on a £1bn tidal lagoon scheme in Swansea as the chancellor gives his Budget speech in the House of Commons.
VIDEO: 'New species' of ancient human unearthedA new species of ancient human has been unearthed in the deserts of Ethiopia, after 3,500,000 years.
VIDEO: Why the Common Dolphin is becoming more commonThe BBC's John Maguire joins a scientific expedition that is studying the Common Dolphin population off the west coast of Scotland, and trying to find out why, until recently, it was quite a rare sight.
VIDEO: Where does Crossrail waste earth go?The BBC's Andrew Bomford finds out where the millions of tonnes of earth go that have been excavated during the cross rail project.
VIDEO: Solar plane pilot: 'Weather risk too big'The planned flight of the sun powered plane, Solar Impulse 2, has been postponed.
VIDEO: How an ancient parasite was frozen in timeProfessor David Siveter from the University of Leicester explains how a 425 million year-old parasite was frozen in time at a site in Herefordshire.
VIDEO: Dog evolution 'earlier than thought'Dogs may have been domesticated much earlier than previously though, Swedish researchers suggest.
VIDEO: Inuit challenge to EU seal banThe Inuit people of Greenland are challenging an EU ban on seal hunting and the trade in seal meat and skins, arguing it has "crashed" the Inuits' economy.
VIDEO: New ways to grow food in spaceA project will see thousands of schoolchildren experiment on seeds that have spent six months on the International Space Station.
Great Barrier Reef status at riskAustralia holds its breath ahead of a Unesco decision about the Great Barrier Reef
How do you pick up an oil platform?How do you pick up an oil platform?
Sending ice to AntarcticaSending ice from the Alps to Antarctica
Solar Impulse awaits 'moment of truth'Solar plane needs weather on its side for week-long Pacific flight
The great 'Mars bake-off' beginsHow to clean a room before building a Mars rover

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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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