::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
Striking galaxy image from HubbleThe Hubble space telescope captures an image of a "barred spiral" galaxy that could help us better understand our own Milky Way.
Largest optical telescope createdAstronomers at the Paranal observatory combine four telescope to create the world's largest virtual device with a 130m-mirror.
Prince optimistic for fisheriesPrince Charles says there is a reason to be optimistic about the state of the world's oceans, but it is "critically urgent" to tackle overfishing.
Malaria toll 'is twice as high'The number of deaths worldwide from malaria has been underestimated, according to data published in the medical journal the Lancet.
Brains may be wired for addictionAbnormalities in the brain may make some people more likely to become drug addicts, according to scientists.
More Galileo satellites orderedThe German-UK consortium building the operational spacecraft for Europe's Galileo sat-nav system wins a contract to provide an additional eight units.
Humble moss 'brought on ice ages'Research shows that primitive moss-like plants could have helped cool the Earth 470 million years ago, bringing on mini ice ages.
Seagrass age surprises scientistsMeadows of seagrass, a keystone species in marine ecosystems, found in the Mediterranean Sea are likely to be tens of thousands of years old, a study shows.
Mega volcanoes 'may be predicted'The eruption of some of the largest volcanoes on the planet could be predicted decades before the event, research suggests.
Super-Earth 'could support life'Astronomers have found a fourth planet with conditions similar to Earth, which they say could support life.
MP's call to pardon 'hero' TuringAn MP tables a motion calling for computer pioneer Alan Turing to be posthumously pardoned over a conviction for gross indecency.
'Supergiant' found in deepest seaA huge crustacean called a supergiant - more than 30cm long - has been discovered 7km down in the waters north of New Zealand.
VIDEO: Art by animals goes on showA work of abstract expressionism by a chimp and a still life of a flower by an elephant are part of a new exhibition in London of artworks created by animals.
Spider sex trick boosts paternitySome male spiders voluntarily "castrate" themselves during sex in order to increase their chances of fathering offspring, according to a new study.
Science decodes 'internal voices'Researchers turn brain waves from thoughts of words into actual words, in a breakthrough that could benefit comatose and locked-in patients.
Self-steering bullet researchedUS researchers are developing a bullet that guides itself to a laser-illuminated target. But an expert is concerned it may be sold to the public.
Isolated Peruvian tribe picturedA Spanish archaeologist has snapped the most-detailed pictures ever seen of an "uncontacted" tribe in the Amazon.
Skin transformed into brain cellsSkin cells have been converted directly into cells which develop into the main components of the brain, by researchers in California.
Gorillas grin 'to reassure pals'Gorillas bare their teeth in a playful "grin" to reassure one another as they play, scientists discover.
Rhino poachers in SA get 25 yearsThree Mozambicans are sentenced to 25 years each in a South African court for rhino poaching, according to the South African national parks body.
'Big cat' theory ruled out by DNAScientists fail to find any evidence that "big cats" killed two roe deer found dead in Gloucestershire.
Spider web's strength explainedExplaining the remarkable strength of spiders' webs
Ancient giant crocodile discovery'Shieldcroc' is an ancient, extinct crocodile that's been discovered by scientists studying fossils in Missouri in the US.
Canada firm halts Argentina mineAfter protests by Argentine environmental campaigners, a Canadian mining firm is suspending its exploration work on a project in La Rioja province.
Search for Cuba offshore oil beginsSearch begins for Cuba's offshore oil deposits
Pythons link to mammals declineNon-native Burmese pythons are the likely cause of a severe decline in mammals living in Florida's Everglades region, a study suggests.
Search for black squirrels beginsScientists want the UK public to report their sightings of black squirrels, in order to estimate the rate at which they are spreading.
In pictures: How elephants cool offThermal images reveal how Asian elephants cool off by directing heat to their trunks overnight.
VIDEO: 'Green' tour of London Olympics siteA look around the site of what is pledged to be the "greenest ever" Olympic Games.
VIDEO: Lifting the Cutty Sark into placeThe historic tea clipper will be reopened to the public in spring 2012. Part of the conservation work included lifting her 3m off the ground.
VIDEO: Science converts thoughts into speechScientists have unveiled a new technique for decoding human brainwaves and then converting them into speech.
VIDEO: How do you weigh a polar bear?Staff at Highland Wildlife Park are trying to weigh Walker the polar bear who is thought to be about 400kg (63 stone).
VIDEO: Thai poachers target elephants for meatThailand's wildlife experts say that elephants could face extinction if they continue to be hunted as a source of meat.
VIDEO: Bats find shelter in Israeli bunkersBats are finding a surprising haven in abandoned Israeli bunkers, researchers say.
AUDIO: Bus-sized asteroid to pass by EarthAstronomers are watching for an asteroid the size of a double-decker bus which will pass within 70,000km of Earth on Friday.
Totally tropical at KewA tour of Kew's Royal Botanic Gardens' exotic orchids
Green void looms after Huhne departureWhat Huhne’s departure means to 'the greenest government ever'
Olympics shoot for green medalWill London 2012 fulfil its ‘greenest Olympics’ pledge?
In pictures: Science meets artWinners of science photography contest dazzle
Analysis: Pharmaceutical woesWhy the pharmaceutical industry is under pressure
Strangford lifeWildlife, landscape and heritage of Strangford Lough
Meet the galanthophilesThe strange world of snowdrop fanciers





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To cite Wessa.net in publications use:
Wessa, P. (2012), 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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