::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
Tarantulas 'turned blue eight times'A study finds that tarantulas evolved almost exactly the same shade of vibrant blue at least eight separate times.
Catholic call to join climate marchesThe Pope's senior adviser on global warming has urged Catholics all over the world to join global climate marches planned for Sunday.
Japan to resume whaling in AntarcticJapan decides to resume hunting whales in the Antarctic after a break of more than a year despite a ruling by the International Court of Justice.
Support for climate deal 'declines'A public opinion survey suggests that support for strong action on climate change has declined since 2009.
'Dangerous' lakes in Everest glacierLakes that have been forming near Mount Everest could threaten settlements downstream if they overflow.
Space rocket debris found off ScillyA large chunk of what is believed to have been an unmanned American space rocket is found in the sea off the Isles of Scilly.
Minister to make fracking decisionThe decision to allow shale gas drilling - or fracking - in Lancashire will be made directly by the government, it has emerged.
Ultrasound scans brain in micro 3DScientists use ultrasound to scan the blood vessels of an entire rat brain in microscopic 3D detail, pioneering a technique they say will improve cancer and stroke diagnosis.
Lead poisons '100,000 birds annually'About 100,000 wetland birds are killed every year from poisoning by discarded lead ammunition, say scientists.
Europe's Mars missions are go - finallyTen years after being formally approved, Europe's ExoMars project is at last ready to send some hardware - a satellite - to the Red Planet.
Spider web gives up DNA secretsSpiders - and their prey - can be identified from the DNA they leave behind stuck on webs, say US scientists.
Court lifts SA rhino horn trade banA South Africa court lifts a ban on the domestic trade in rhino horns which was imposed by the government in 2009 to stem poaching.
Shark drones to patrol Australian coastDrones and "smart" drum lines will be deployed to protect swimmers on New South Wales' north coast from shark attacks, the state government says.
China robot event pulls Beijing crowdsThe World Robot Conference in Beijing has drawn big crowds to its showcase of "jiqiren", or "machine people".
'Good' settlement for UK scienceThe UK chancellor has said that the science budget will be protected in real terms - equating to an increase.
Private funds may restore peatlandsPrivate investors are being invited to help fund the restoration of about one half of the UK's peatlands.
2015 likely to be warmest on recordTemperatures across the globe are likely to break records in 2015 with readings running "well above" any previous year, scientists say.
VIDEO: Drone used to monitor food waste gasesAn experimental drone fitted with sensors is being deployed to monitor gases rising from rubbish dumps.
VIDEO: What has Bristol achieved as 'green capital'?John Maguire visited Bristol, which has been serving as Europe's official Green Capital, to see what the city has achieved in 2015.
VIDEO: Switzerland’s vanishing natural wonderStriking drone footage shows the extent of the retreat of Switzerland's Rhone Glacier, as scientists warn such magisterial ice-masses will have almost vanished by the end of the century.
VIDEO: 'Lead shot is poison for hunters'Why one Danish hunter campaigns against the use of lead ammunition.
VIDEO: Hunting for Einstein's missing wavesAn experiment in Italy seeks to find Albert Einstein's last great prediction - gravitational waves.
VIDEO: Conservation's 'gadget man'Meet the RSPB's 'gadget man' who builds devices to help conservation scientists gather data.
VIDEO: A brief history of climate talksRebecca Morelle reports for BBC Newsnight on the background to the upcoming summit in Paris.
VIDEO: What is Einstein's Theory of Relativity?Everything you need to know about Einstein's 100-year-old Theory of General Relativity.
Eyesores or sights for sore eyes?Should powers station cooling towers be protected?
Is there an economic case for tackling climate change?Is there an economic case for tackling climate change?
Is this the subject with the most baffling jargon?The strange world of enviro-jargon
Taking on Godzilla in AlaskaThe Alaskan fishing village taking on 'Godzilla'
The hunt for Einstein's missing wavesThe hunt for Albert Einstein's missing waves
COP21: Malawi's battle to hold on to forestsRenewable tech and coal power ambitions in Malawi

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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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