::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
How ant armies move massive mealsIn a new study, physicists reveal how ants co-operate to carry huge chunks of food back to their nests.
Rare rhino death leaves just fourOne of the last five Northern White Rhino left in the world has died.
Structural secret of T. rex's teethNew research reveals the key to the serrated tooth structure that made carnivorous theropod dinosaurs such successful predators.
EU satellite gears up for data floodEurope's Sentinel-2a satellite, which will "carpet map" the Earth's land surface day-in, day-out, is on course to go into full operation in early or mid-October.
Pair at court over Cecil lion killingA Zimbabwean hunter and farm owner arrive at court in the town of Hwange, facing poaching charges over the killing of famed lion Cecil.
Braking error led to spaceship crashInvestigators say a fatal Virgin Galactic spaceship crash last year was caused by structural failure after the co-pilot unlocked a braking system early.
'Laughing gas' emissions understatedEmissions of nitrous oxide (N2O) from agriculture in some locations are underestimated by 40% according to new research.
Ancient tooth found in French caveA human tooth dating to around 565,000 years ago has been found by a 16-year-old volunteer in France.
Tech experts caution on killer AIMore than 1,000 tech experts, scientists and researchers have written a letter warning about the dangers of autonomous weapons.
Neolithic house discovery at AveburyArchaeologists believe they may have found the remains of a house where people who built Avebury stone circle may have lived.
Orchid spotters map shifting bloomsA UK citizen science project to study when and where different orchids bloom has already revealed 200 new flowering locations for particular species.
Pluto may have 'nitrogen glaciers'Pluto would appear to have glaciers of nitrogen ice, the latest pictures from the New Horizons probe suggest.
First English US founders identifiedScientists identify the remains of four English men who were among the early leaders of Virginia's Jamestown settlement - the first successful British colony.
Chick has surgery on broken beakA kite chick in Gloucestershire which broke its beak after growing too big inside its egg, undergoes reconstructive surgery.
Device limits aircraft bomb impactA new system that contains the explosion of bombs smuggled onto aircraft has been successfully tested.
Four-legged snake fossil discoveredScientists find the first ever four-legged snake, which lived at the time of the dinosaurs and probably dug burrows.
'Earth 2.0' found by Nasa telescopeA haul of planets from Nasa's Kepler telescope includes a world sharing many characteristics with Earth.
VIDEO: Chimps eating clay 'as supplement'A community of chimpanzees in Uganda is increasingly eating clay to boost their mineral intake, research suggests.
VIDEO: Virgin Galactic crash: Brakes blamedInvestigators have said a Virgin Galactic spaceship crash was caused by structural failure after the co-pilot unlocked a braking system early.
VIDEO: Chasing Britain's most threatened duckWhy conservationists in the Scottish Highlands are chasing the UK's most threatened breeding duck.
VIDEO: Scientists fear robotic weaponsMore than 1,000 scientists, including Stephen Hawking, have called for a ban on developing artificial intelligence for military use and to build robotic weapons.
VIDEO: The bag designed to thwart terroristsScientists have developed what they're describing as a bomb proof material that could be a major step forward in aircraft security.
VIDEO: All the Pluto pictures in 60 secondsIt's the dwarf planet that keeps on giving. Now Newsround has compiled all the pictures of Pluto so far into one manageable minute.
VIDEO: Soyuz successfully docks at ISSAstronauts from Russia, the US and Japan have successfully docked at the International Space Station.
VIDEO: Rare wildcat kittens emerge from denThree wildcat kittens bred at a wildlife park in Scotland emerge from their den for the first time since birth.
Why we like to believe that dinosaurs were scalyWhy do we like to believe that dinosaurs were scaly?
Bloodhound Diary: A riveting 'tail'Project approaches the end of the mechanical build
Iberian lynx returns to Spain from verge of extinctionHard work saves Spanish lynx from extinction
Australia's role in search for alien lifeSearching for alien life with a telescope down under
Fresh water 'key' to monsoon forecastTrying to predict the South Asian monsoon by studying the ocean
Arsenic threat: Is it safer to cook rice in a coffee percolator?Is it safer to cook rice in a coffee percolator?

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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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