::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
Broody octopus keeps four-year vigilA deep-sea octopus is observed nursing her eggs for more than four years - the longest brooding time seen in any animal.
Mystery of lemon-shaped Moon solvedTides and spin gave the Moon its strange lemon shape more than four billion years ago, research reveals.
Minister wants end to animal testingNorman Baker - the minister in charge of regulating animal experiments - tells the BBC he wants them to end.
Broken robots 'learn to keep going'Engineers take a step towards having machines that can operate even when they are damaged by developing a robot that can teach itself to walk, even with a broken leg.
Tablet screens to correct sight lossUS engineers have developed a prototype tablet display that compensates for an individuals' vision problems.
Birds beat machines in hover testMicro-drones are just starting to catch up with the hovering and flight performance of the tiny hummingbird, say scientists.
'Quantum Cheshire Cat' observedScientists have separated a particle from one of its physical properties - proving a theory known as the "quantum Cheshire Cat".
How faces drive first impressionsUK scientists model the physical attributes that underpin our social judgements about strangers.
Astronomers weigh up Milky WayThe Milky Way is lighter than previously thought and is only about half the mass of a neighbouring galaxy, researchers conclude.
MPs bicker over climate reportDespite dissent, MPs have endorsed the findings of a UN climate panel that says humans are the dominant cause of global warming.
Eggshells may act like 'sunblock'Birds' eggs show adaptations in pigment concentration and thickness to allow the right amount of sun for embryos, scientists say.
Gecko sex satellite back in touchFears recede over the fate of a Russian space satellite carrying gecko lizards as part of a sex experiment, after ground control restores contact.
'Brain hub predicts negative events'Scientists have identified a part of the brain that may help us predict when things are about to go wrong and could play a part in depression.
Beauty spots still at fracking 'risk'Government guidance that fracking licences can only be issued for beauty spots in "exceptional circumstances" receives a mixed response from campaigners.
Dinosaurs' extinction 'bad luck'Dinosaurs might have survived if the asteroid that wiped them out had hit the Earth a few million years later or earlier, a new study suggests.
California hit by raging wildfiresTwo fast-moving fires in California destroy 10 homes and force the evacuation of hundreds more, as a man dies in a lightning strike in Los Angeles.
Wildlife loss link to child slaveryNew research suggests that the global reduction in wildlife is connected to an increase in human trafficking and child slavery.
Mobile test illuminates risk takingSpecially designed mobile games can help scientists answer important questions about cognition, a team finds.
Secret of sandstone shapes revealedGeologists discover that the stress applied by gravity is what controls the shape of dramatic sandstone landmarks.
Four-winged dinosaur found in ChinaThe largest ever four-winged dinosaur has been discovered in China, with remarkably long feathers on its hindwings and tail.
'Fluffy' dinosaurs were widespreadA discovery of 150 million year old fossils in Siberia indicates that feathers were much more widespread among dinosaurs than previously thought.
Rosetta's comet seen in close-upEurope's Rosetta probe has acquired new images of the comet it is chasing through space.
Nasa seeks aid with Earth-Mars linksNasa is asking for help to get data back from future science missions orbiting Mars or roaming its surface.
Dogs 'hardwired' to be jealous wagsJealousy is not just part of the human condition, a study suggests, it appears to be hard wired into the brains of dogs too.
Voyage to unlock Arctic secretsA crew of sailors is embarking on a pioneering citizen science expedition through the Northwest Passage between Canada and Greenland.
Kepler sees world with distant orbitThe Kepler Space Telescope has spotted a distant world with the longest year of any planet in the mission's inventory.
Africa 'needs green revolution'Sub-Saharan Africa's agricultural sector needs to harvest the fruits of biotechnology in order to establish sustainable development, says a Chatham House report.
Call for end to 'throwaway society'A ban on sending leftover food to landfill is needed to move away from a 'throwaway society', say MPs.
Government to end nuclear waste vetoThe UK government wants to scrap a community veto which allows local politicians to block a future £12bn nuclear waste repository.
Carbon concerns over wood burningBurning wood to fuel power stations can create as many harmful carbon emissions as burning coal, according to a government report.
EU sets 30% energy savings targetMembers of the European Union will have to boost their energy efficiency by 30% by 2030, according to the European Commission.
Beef's greater environment burdenA new study says the production of beef is around 10 times more damaging to the environment than any other form of livestock.
First flamingo egg 'for eight years'Flamingos at a wildlife centre in Wearside produce their first egg in eight years, according to the charity that runs it.
Fur seals feel climate impactsChanges in the Antarctic climate are showing up in the fur seal population, say scientists who have studied the animals for 30 years on the British Overseas Territory of South Georgia.
Bats 'fly by polarised light'Zoologists find that bats use the pattern of polarised light in the sky at sunset to help them navigate.
AUDIO: Why the Moon is shaped like a lemonProfessor of planetary sciences Ian Garrick-Bethell explains what gave the Moon its unusually distorted shape.
VIDEO: East Coast beaches 'fast disappearing'Up to half a mile of land is being lost every 50 years due to coastal erosion, as Sian Lloyd reports.
VIDEO: Dolphin filmed in the River SevernMarine experts have said a dolphin spotted in the River Severn in Gloucestershire will make its own way back to the sea.
VIDEO: Seals 'stressed' by warming seasWarming seas are reducing the food supply for Antarctic seals, say researchers.
VIDEO: Drones homing in on wildlife poachersCivilian drones are being tested across Africa's game reserves in a hi-tech battle with poachers threatening the continent's wildlife tourism industry.
VIDEO: Call for end to 'throwaway society'MPs have called for a ban on food waste going in to landfill.
VIDEO: 'Depressed' polar bear not movingArturo, the polar bear dubbed 'the world's saddest animal', will be staying at his zoo in Argentina, despite a massive petition calling for him to be moved to a colder climate.
VIDEO: Giant python gets a health checkA team at Chester Zoo has given a check-up, including heart ultrasound scan to its giant reticulated python, named JF.
Bumps, buzzards and critical speciesCoral munching bumphead fish give insight into conservation
The reindeer herders battling a mineThe reindeer herders fighting a British mining company
Wide-eyed lemurs on the webFifty years of data about endangered primates goes online
Tedium, tragedy and tar: The slowest drops in scienceWhat do long term experiments actually tell us?
Perils of the English countrysideThe risks of walking in the English countryside
Row over 'bonkers' EU energy planEuropean spat over energy savings target
The mystique of the 'child prodigy'Scientist claims 'child prodigy' getting credit for his discovery
The ship that totally failed to change the worldThe atomic ship that totally failed to change the world
VIDEO: Who was that man on the Moon?Why the US public lost interest in lunar exploration
Do butterfly wing patterns really mimic predator eyes?Do butterfly wing patterns really mimic predator eyes?
Giant python gets a health checkEnormous reticulated python gets annual check-up
Dream Cars: Innovative Design, Visionary IdeasModels and concepts by famous car manufacturers
Climate change shuttle diplomacyUK Climate Secretary travels the world for emissions deal
The virus detective who discovered EbolaThe young medic who found the deadly Ebola bug

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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/

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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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