::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
New images from Flight MH370 huntThe team looking for missing flight MH370 releases detailed images of the seabed for the first time, revealing extinct volcanoes and deep depressions.
Complex molecule discovered in spaceThe discovery of a branched carbon molecule 27,000 light-years from Earth suggests the building blocks of life may be ubiquitous throughout the galaxy.
World wildlife populations 'plummet'The global loss of species is even worse than previously thought, with wildlife populations halving in just 40 years, a report says.
Date fixed for comet landing attemptEurope's daring attempt to put a small robot on the surface of Comet 67P will take place on Wednesday 12 November.
Mars rover bites mountain's baseNasa's Curiosity rover on Mars drills its first full hole since May - into a mudstone at the base of Mount Sharp in Gale Crater.
Obama expands Pacific marine reserveUS President Barack Obama expands a marine reserve in the Pacific, creating the largest network of oceanic protected areas in the world.
African fish nourish AmazonThe Amazon rainforest is being fertilised by the remains of ancient fish blown in by great duststorms from Africa.
'Turtle smuggling' Canadian arrestedA Canadian man is charged with wildlife smuggling after guards at the US border found 51 turtles in his trousers, authorities have said
Indian Mars probe sends first imagesIndia's space agency releases its first pictures of Mars as its satellite begins work a day after entering orbit around the Red Planet.
Threatened birds of prey 'vanish'Two of the rarest birds of prey in England, which had been satellite tagged, vanish in unexplained circumstances.
Brazil releases 'good' mosquitoesBrazilian researchers release thousands of mosquitoes infected with a bacteria that suppresses dengue fever into the environment in Rio de Janeiro.
Novel antibiotic class createdScientists have designed a new class of antibiotic which seeks and destroys resistance genes in bacteria.
Melt ponds forecast ice retreatA UK technique for projecting the extent of summer sea ice in the Arctic demonstrates its skill by accurately calling this year's melt events.
First Russian woman in ISS missionRussia has sent a woman into space for the first time in 17 years as part of a joint US-Russian mission to the International Space Station (ISS).
Water seen on Neptune-sized planetA cloud-free atmosphere reveals signs of water vapour on HAT-P-11b, the smallest planet beyond our Solar System ever to yield such an insight.
Cosmic study 'underestimated' dustScientists who claimed to have found evidence for a cosmic super-expansion just after the Big Bang underestimated a key confounding factor in their research, according to a new analysis.
Molten metal batteries for the gridEngineers have invented a battery made of three liquefied metals, which they say is efficient and cheap enough to store power on the electric grid.
'Artificial eye' to detect particlesThe human eye has inspired physicists to create a processor that can analyse particle collisions 400 times faster than currently possible.
Slippery banana study wins Ig NobelResearch that investigated why bananas are slippery when you step on them wins one of this year's Ig Nobel prizes.
Nasa picks astronaut ship designsThe US space agency picks the companies it hopes can take the country's astronauts back into space - a capability lost when the shuttles retired in 2011.
Europeans drawn from three 'tribes'Most present-day Europeans are a mixture of three ancient populations, according to a major study published in the journal Nature.
Liberia in 'trees for cash' dealLiberia is to become the first nation in Africa to completely stop cutting down its trees in return for development aid.
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.
Farming 'vital for global growth'Scientific agricultural advances can help "climate-proof" farming systems around the globe, especially in developing nations, a conference will hear.
Global protests over climate changeStreet protests demanding urgent action on climate change attract hundreds of thousands of marchers across more than 2,000 locations worldwide.
Rockefellers to divest fossil fuelsThe Rockefeller family, which made its fortune from oil, is to sell its investments in fossil fuels and put money into clean energy.
Murder 'comes naturally' to chimpsA major international study finds that killings among chimpanzees result from normal competition, not human interference.
Inky prints show state of hedgehogsHedgehogs are more thinly spread in the UK than previously believed, a study using ink pads to record their paw prints reveals.
Ancient China fish 'nearly extinct'The Chinese sturgeon, thought to have existed for more than 140 million years, is now on the brink of extinction, say local media.
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.
VIDEO: Bomb-makers tracked via sewersNew technology allows security services to analyse the contents of the sewers to discover where people are making home-made bombs.
VIDEO: Cern at 60 in 60 secondsThe European Organisation for Nuclear Research (Cern) is celebrating its 60th birthday. Here is a quick look at its life so far - in 60 seconds.
VIDEO: Work to lift flood-prone road beginsWork is beginning to raise part of one of the main roads in the Somerset levels to protect it from future flooding.
VIDEO: Pony meat plan proves controversialA charity has developed a range of meat products made from the iconic Dartmoor Pony, in what it says is a bid to save the species.
VIDEO: Japan volcano rescue effort resumesRescue teams in Japan have resumed their search for survivors of a volcanic eruption on Saturday.
VIDEO: Flea beetles surge as bees protectedFarmers warn oil seed rape crops are being destroyed because of a ban on a pesticide brought in to protect bees.
VIDEO: Inside the 'UK's greenest homes'How builders and architects in Chichester are embracing new technology to make houses greener and more attractive to buyers.
AUDIO: Reward offered for missing 'rare birds'A search is underway for two hen harriers which have gone missing, prompting the RSPB to offer a £1,000 reward for help in their safe recovery
Is your brain male or female?Are male and female brains that different?
Sewer sensors to sniff out bombsSewer sensors to sniff out bombs
EU review of eco-laws raises concernNew EU team to review Europe's green policies
An electronic revolution in the doctor's bagHow new medical tools change our relationship with doctors
How keep-fit gyms gripped VictoriansExercising in coat tails and corsets
Bloodhound Diary: The ultimate 'kit car'The complexities of assembling the ultimate kit
Ebola drains weak health systemsEbola pushes West Africa's weak health systems over the edge
Weather report: Forecasts improvingAre weather forecasts really becoming more accurate?
It's outer space, but with filling stationsHow space rocks could become private cosmic filling stations
Why India's Mars mission is so cheap - and thrillingHow did India get to Mars so cheaply?
Climate summit advances towards Paris dealSun shines on climate summit as majority of leaders pledge action
Mangalyaan: India's race for space successWill India's Mars mission reach the orbit?





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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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