::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
Decision due on comet landing siteThe European Space Agency is about to announce the site on Comet 67P where the Rosetta mission will try to make a historic landing.
Brazil builds giant Amazon towerConstruction has begun on a giant observation tower in the heart of the Amazon basin in Brazil to monitor climate change.
Ban on shark trade comes into forceIn a significant step forward for shark conservation, all trade in five named species is to be regulated from today.
Progress for giant laser instrumentThe Advanced Ligo instrument, a laser "ruler" built to measure the traces of gravitational waves, is progressing at amazing speed, scientists say.
Robot could load up dishwasherA robot unveiled today at the British Science Festival will be loading dishwashers next year, its developers claim.
'Giant swimming dinosaur' unearthedA giant fossil, unearthed in the Sahara desert, has given scientists an unprecedented look at Spinosaurus - the largest-known carnivorous dinosaur.
Brain 'still active during sleep'The brain is still active while we sleep, say scientists, who found people were able to classify words according to their meaning during their slumber.
Western Australia shark cull blockedWestern Australia's shark cull is to be halted after the state's environmental regulator advised against it, citing "scientific uncertainty".
Rosetta comet chaser takes 'selfie'The Rosetta spacecraft has sent a hauntingly beautiful picture of itself from deep space.
Consumers driving 'shock' tree lossAround five football fields of tropical forest have been illegally cleared every minute between 2000 and 2012 according to a new report.
Concussion 'breathalyser' proposedScientists in Birmingham are trialling new medical tests that lead to rapid, pitchside diagnosis of concussion in sport.
'Signs of recovery' in ozone layerThe ozone layer around the earth is showing its first sign of thickening after years of steady depletion, a UN team says.
Amazon destruction increases againNew figures show destruction of the Amazon rainforest in Brazil has risen again, with more than almost 6,000 sq km (2,315 sq miles) being cleared.
Mapping reveals Stonehenge secretsArchaeologists have unveiled the most detailed map ever produced of the earth beneath Stonehenge and its surrounds.
Computers trained to understand musicNew software presented at the British Science Festival aims to give music producers the power to manipulate sounds more intuitively.
Prioritising islands' pest controlScientists develop a way to identify island habitats under threat from invasive vertebrates, such as rats, and in greatest need of protection.
CO2 rises at fastest rate since 1984Concentrations of warming gases in the atmosphere reached record levels in 2013, the World Meteorological Organisation says.
Drugs 'entering waterways' through urineAs drugs pass through us, they enter the UK's waterways., leading to a startling change in the habits of wildlife.
China boy finds 3,000-year-old swordArchaeologists date the weapon to the Shang or Zhou dynasties - the dawn of Chinese civilisation.
'Pocket' diagnosis for Parkinson’sSmartphone technology revealed at the British Science Festival could help diagnose and treat Parkinson's disease.
Liberia 'faces huge Ebola surge'Ebola is spreading exponentially in Liberia, with many thousands of new cases expected in next three weeks, the World Health Organization says.
Meteorite lands in Nicaragua capitalA small meteorite which may have broken off an asteroid caused a 12m-wide crater near Managua's international airport, Nicaraguan officials say.
House-sized asteroid flies by EarthA 60ft asteroid is flying close to Earth but is not expected to pose any danger, US space agency Nasa says.
Economics 'driving language loss'A thriving economy can lead to the extinction of some languages, scientists believe.
British Ebola patient dischargedThe first British person to contract Ebola during the outbreak in West Africa has made a full recovery, after being treated in a specialist NHS unit.
Food crop wild relatives endangeredScientists from the University of Birmingham compile a database that identifies and maps the wild relatives of common food crops.
Blue whale numbers bounce backResearchers believe that California blue whales have recovered in numbers and the population has returned to sustainable levels.
Spitting fish 'adjust for distance'Scientists say the jets of water that archer fish use to shoot down prey are precisely tuned, to make maximum impact at just the right distance.
Carbon in soil vulnerable to warmingThe huge stores of carbon locked in the world's soils are more vulnerable to rising temperatures that previously thought.
Badger vaccination scheme under wayA scheme to vaccinate badgers against bovine tuberculosis in a bid to tackle the disease in cattle is launched by the government.
Monkey leaders have different brainsNeuroscientists discover that primate brains show consistent differences according to their social status
Rare antelope births 'fantastic'The birth of a pair of rare bongo antelopes in captivity is "fantastic news" for the "critically endangered" species, say conservationists.
World's rarest bird needs new homeThe last remaining population of the world's rarest bird, the Madagascar pochard, needs a new wetland home if it is to thrive again, a study reveals.
Memories 'flipped' from bad to goodNeuroscientists artificially turn a mouse's fearful memory into a positive one, and vice versa.
VIDEO: People power sparking renewable energyIn a shantytown in Rio De Janeiro, a British-backed scientific initiative harnesses the energy we generate in our daily lives to light up a football pitch.
VIDEO: Formula E ready to raceFormula E is backed by some of the biggest names in the industry and on Saturday Beijing will hold the inaugural race of the season.
VIDEO: Ozone layer 'shows signs of recovery'The Earth's protective ozone layer is starting to repair itself, according to a panel of United Nations scientists.
VIDEO: US fears for declining bird numbersThe United States puts 230 species of birds on a watch list because of their rapidly declining numbers.
AUDIO: How badgers are culledA second year of badger culling has begun in parts of Gloucestershire and Somerset in a bid to tackle bovine TB.
AUDIO: How much does the Earth weigh?Scientists are exploring why it is so difficult at accurately measure the Newtonian constant of gravity.
AUDIO: Meteorite strikes NicaraguaA meteorite that landed near the Nicaraguan capital Managua on Sunday could have come from the 2014 RC asteroid which was passing the earth at the time, experts have said.
VIDEO: Second year of badger culling beginsA second year of badger culling has begun in parts of Gloucestershire and Somerset in a bid to tackle bovine TB.
Future of Scottish science contestedWhat impact could Scotland vote have on research?
Alien species making England homeWhy do terrapins live in canals?
Pakistan-India monsoon floods: Averting future disastersDams and reservoirs could mitigate South Asia floods
Mars probe 'inspired by lobsters'Designers of new Mars instrument draw on nature
Squeezing out water to save the futureThe business of saving water for all of our futures
How do you stop lava?Can human engineering stop the flow of volcanic lava?
China's Island FactoryChina makes new territory in the South China Sea
Selfie science: taking perfect picsTips and tricks on taking the perfect photo
Fast charges drive electric car boomNew charging tech drives electric car boom
VIDEO: Inside the mission to MarsIncredible images from the Curiosity Rover
Ebola: How bad can it get?Ebola outbreak takes turn for worse - can it be stopped?
Bloodhound Diary: Three engine equationThe power units needed to drive a 1,000mph car
The battle for anonymity on the webHorizon meets the pioneer of anti-surveillance web tech

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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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