::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
Oceans face 'acidification crisis'A major report warns that life in the seas will be irreversibly changed unless CO2 emissions are drastically cut.
Cystic fibrosis gene therapy boostA gene therapy has stabilised and slightly improved cystic fibrosis in some of 136 patients in a trial.
Pluto shows its spots to Nasa probeThe New Horizons mission to Pluto releases new colour views of the dwarf planet, revealing some intriguing dark spots.
BP to pay £12bn for Gulf oil spillBP has reached an $18.7bn (£12bn) settlement with the US Department of Justice following the 2010 Gulf of Mexico oil spill.
Solar Impulse breaks solo recordSwiss adventurer Andre Borschberg breaks the record for the longest ever non-stop solo-flight without refuelling, as his solar-powered plane continues to reach across the Pacific.
Global prize for anti-poverty leaderThe founding chairman of a leading rural development and anti-poverty organisation wins the 2015 World Food Prize.
New test pins down 'time of death'Forensic researchers develop a new method for establishing an accurate time of death after as much as 10 days.
Rosetta spies cometary sinkholesThe comet being studied by Europe’s Rosetta probe is riddled with pits that formed much like sinkholes here on Earth, say scientists.
'Celeb mind game' gives memory cluesResearchers use "mind games" to reveal clues about how brain cells change when making new memories.
Probe refines Pluto flyby pathThe American New Horizons spacecraft makes its last planned targeting manoeuvre as it bears down on Pluto.
Seventh shark attack in N CarolinaA 68-year-old man is badly injured by a shark in North Carolina in the seventh attack off the state's coast in less than three weeks.
Oranges bug 'hacks insect behaviour'A deadly disease of citrus plants spreads by manipulating its insect host, research suggests.
'Leap second' delays midnightMidnight came later on Tuesday as for the first time in three years an extra second was added to the official time set by atomic clocks.
Boat-leap dolphin breaks woman's legsA dolphin jumps into a boat off the coast of southern California, hitting a woman and breaking both of her ankles.
VIDEO: ‘Irreversible change’ to sea life from CO2A major report warns that life in the seas will be irreversibly changed unless CO2 emissions from industrial society are drastically cut.
VIDEO: The blind birdman of BrazilJuan Pablo Culasso has been blind since birth but he has become one of the best "birdwatchers" in South America.
VIDEO: 'I feel like I can fly forever'A solar-powered plane that is attempting to cross the Pacific Ocean is encountering its first weather front.
VIDEO: Leap second: What does it mean?Midnight will come later tonight, as for the first time in three years, an extra second is added to the official time set by atomic clocks.
VIDEO: World's smelliest plant blooms in EdinburghOne of the world's largest and smelliest flowers has blossomed for the first time in Scotland.
VIDEO: Sir David tells Obama how to save planetThe distinguished broadcaster and naturalist, Sir David Attenborough, has been on a visit to the White House at the personal invitation of President Obama.
VIDEO: Taking giraffes for a scientific walkHow zoo giraffes are helping veterinary scientists to find out if very long, spindly legs are a help or a hindrance for walking.
VIDEO: Hands on nature at Oxford museumOxford University Museum of Natural History has been shortlisted for the Art Fund Museum of the Year.
Why insects are marvels of engineeringHigh-speed video reveals how insects take to the air
Robots on the marchRobots move into homes and the workplace
'Circademics' get serious about circus'Circademics' get serious about the circus
Astronaut Samantha Cristoforetti on life in spaceItalian astronaut Samantha Cristoforetti on life in space
Does the future of wildlife lie in captivity?Does the future of wildlife lie in captivity?
China's carbon crunchCharting China's climate change ambitions

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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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