::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
Controllers banking on Philae wake-upThe European Space Agency says it will conduct no more dedicated searches for its lost comet lander, and will now wait for the probe itself to call home.
Study fells cosmic inflation claimScientists who claimed to have found evidence for a cosmic super-expansion at the Big Bang made no such discovery, a soon-to-be published study will say.
'Cold plasma' kills off norovirusNorovirus, the most common cause of gastroenteritis in the world, can be killed with "cold plasma", scientists report.
Scars reveal ageing whales' secretsScientists studying one of the most mysterious whale species find they form long-term alliances, sometimes lasting many years.
Chicks place low numbers on the leftScientists in Italy find that baby chickens associate low and high numbers with left and right, respectively - suggesting they may count using a "mental number line" like humans do.
Climate concern 'linked to floods'Belief in the reality of climate change has risen among the British public, partly because of the 2013 winter floods, according to a report.
Icebergs 'have sound signature'Listening to icebergs could help to assess the extent of glacier melt, a study suggests.
Skull clue to exodus from AfricaAn ancient skull discovered in Israel could shed light on the migration of modern humans out of Africa some 60,000 years ago.
Ebola virus mutating, scientists sayScientists at the Institut Pasteur in France who are tracking the Ebola outbreak in Guinea say the virus has mutated.
Shell revives Arctic drilling plansRoyal Dutch Shell revives Arctic drilling plans, despite announcing a $15bn cut in global spending and profit figures that disappointed investors.
Astra Zeneca drive for genetic drugsAstra Zeneca announces a research programme to develop a generation of medicines to treat the genetic causes of many debilitating diseases.
Scottish fracking block announcedThe Scottish government announces a block on planned fracking operations, pending the outcome of further inquiries.
Curiosity rover back in the grooveNasa's Curiosity rover gets straight back to work after a software upgrade by drilling a new test hole.
First step towards saving rhinoExperts are pinning their hopes on in-vitro fertilisation (IVF) to save the northern white rhino from extinction.
'World can cut carbon emissions and live well'Cutting carbon emissions can be achieved while improving living standards - but big trade-offs in land use and energy are needed, say ministers.
'Dippy' makes way for blue whaleLondon's Natural History Museum is re-modelling its entrance, moving out the famous Diplodocus skeleton and moving in the bones of a blue whale.
US museums consider London outpostThe world's largest museum and research institution could be heading for London as part of a multi-million dollar redevelopment of the 2012 Queen Elizabeth Olympic Park.
Kepler finds ancient solar systemAn ancient solar system similar to our own is discovered by scientists at the University of Birmingham studying data from the Kepler telescope.
Planet hosts giant ring systemAstronomers say they have discovered a gigantic ring system around a distant planet - the first such structure discovered outside our Solar System.
Best ever view of asteroid CeresThe best image ever acquired of Ceres, the largest asteroid in the Solar System, is now in the hands of science.
AI won't run amok, says MicrosoftThe chief of one of Microsoft's research divisions says he does not believe artificial intelligence systems are going to run out of control, threatening humankind.
England's environment 'in decline'England's natural environment is in decline and its deterioration is harming the economy, an independent advisory group warns.
Risk of extreme weather 'doubles'Extreme weather arising from a climate phenomenon in the Pacific Ocean will get much worse as the world warms, according to climate modelling.
'Time to link nature and wellbeing'Scientists need to work together to capitalise on a growing body of evidence showing a link between biodiversity and human wellbeing, a US review suggests.
Obama push to expand Alaskan refugePresident Barack Obama is to propose setting aside the majority of Alaska's national wildlife refuge as a wilderness area.
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: NASA launch to study soil moistureNASA has launched an Earth-observing satellite, which will measure the amount of moisture in soil.
VIDEO: Starlings 'ballet' thrills cityPeople in Norwich have been turning their heads skywards at thousands of starlings performing a "mesmerising murmuration" en route to a new city roost.
VIDEO: Giant beaked whales show their scarsThe Baird's beaked whale - one of the most mysterious marine mammals - forms long-term alliances that last many years, footage reveals.
VIDEO: 'New generation' drug research planPharmaceutical giant AstraZeneca has announced a research programme to develop a new generation of medicines to treat the genetic causes of many debilitating diseases.
VIDEO: How beavers can change our riversClaire Marshall looks at the impact beavers have on the environment, after a decision to allow a family of wild beavers to stay on the River Otter in Devon.
VIDEO: Baby rhino; zoo's first in 35 yearsA rhinoceros at Copenhagen Zoo in Denmark has given birth to a healthy male calf, the first to be born there for 35 years.
VIDEO: 3D printed heart saves girl's lifeA two-year-old girl who was born with a serious heart defect has had a life-saving operation thanks to a 3D printer.
VIDEO: Will India act on climate change?Indian Prime Minister Narenda Modi and US President Barack Obama are holding talks on climate change.
Will the falling oil price undermine green energy?What do falling oil prices mean for green energy?
Diplodocus v blue whale: Who'd win?Who'd win fantasy fight between diplodocus and blue whale?
'Mystery' beavers permitted to stayMystery family of beavers allowed to stay in English river
Will the UK's gas holders be missed?Will the UK's iconic 'gasometers' be missed?
No US-India deal on climate changeWhy the US and India walk different paths on climate
How to build world's tallest liftHow to build the world's tallest lift
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

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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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