::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
Plant uses raindrops to eat antsA carnivorous plant uses raindrops as a power source to bounce ants into a trap, researchers find.
Wild mammals 'return to Chernobyl'The Chernobyl exclusion zone now has more wildlife than before the 1986 nuclear accident, researchers say.
Cacti facing extinction, study warnsA global assessment concludes that almost one-third of cactus species face extinction due to unsustainable harvesting and illegal trade.
Nobel Prize for anti-parasite drugsThe Nobel Prize for physiology or medicine has been awarded to two teams for their groundbreaking work on parasitic diseases.
Chile creates new marine reservesChile announces the creation of two new marine reserves off its coast which together will cover more than a million sq km.
Mammal species outlived the dinosaursScientists have discovered a species of ancient mammal that survived the event that led to the extinction of the dinosaurs.
UN battle looms over climate costsDivisions between rich and poor countries re-emerge as nations submit their plans for tackling climate change to the UN.
Supernova 'stream' in lab's sightsA global collaboration will aim to unravel the mysteries of neutrinos - also known as "ghost particles".
Additive promises crash-safe fuelChemical engineers develop an additive for jet fuel that could prevent explosions without compromising engine function.
Charon moon seen in super detailPluto's major moon, Charon, takes centre stage in this week's release of new pictures from the New Horizons mission.
Africa's farming 'needs young blood'Modernising Africa's agriculture sector to attract young people will help tackle youth unemployment and food insecurity, a report suggests.
Diesel policy 'a mistake' - ex-ministerFormer Labour science minister Lord Drayson says his government made a mistake in promoting diesel cars as they are "killing people".
Nasa photo archive posted onlineOne man's mission to upload 13,000 photographs that Nasa said it didn't have the resources to publish.
Ceres' spots remain mysteriousThe team behind Nasa's Dawn mission to Ceres releases striking new images, but remains unable to explain the dwarf planet's most intriguing mystery.
Plastic in Thames fish is a wake-upThe discovery of plastic in the guts of Thames fish highlights the need for everyone to take greater care with how they dispose of rubbish, say campaigners.
Science leaders make investment caseLeading figures in the scientific community argue for a lift in public research spending to boost the British economy.
Zimbabwe to ban electric water heatersZimbabwe is to ban electric water heaters and require all new properties to use solar power, in an attempt to tackle big power shortages.
VIDEO: Nobel Prize rewards parasite researchThe Nobel Prize for physiology or medicine has been split two ways for groundbreaking work on parasitic diseases.
VIDEO: How plastic may end up in your foodBiologist Dr Pennie Lindeque from Plymouth Marine Laboratory explains how plastics in the marine environment get into the food chain.
VIDEO: Plastic bag charge: Environmental impactMany shoppers in England will have to pay 5p for plastic carrier bags from Monday in a bid to slash the 7.6 billion handed out every year.
VIDEO: Farmers find woolly mammoth skeletonFarmers in Michigan uncover a woolly mammoth skeleton in a soybean field.
VIDEO: Plastic in oceans 'threatens food chain'As England prepares to introduce a charge for plastic bags, Science Editor David Shukman reports on the possible threat to the food chain, by the plastics broken down into tiny fragments in our oceans.
VIDEO: St Albans sinkhole 'caused by brickworks'The British Geological Survey says a large sinkhole which opened in St Albans, Herts, may be linked to an old brickworks which used to be on the site.
VIDEO: Tiny killer fly caught on cameraNeuroscientists have recorded the first video footage of a tiny killer fly catching its prey in mid-air.
VIDEO: Areas identified for Wildcat survivalConservationists have identified six areas in the Western Highlands as places where the wildcat has the best chance of surviving, as Graham Satchell reports.
Work that won Nobel Prize for medicine 2015The work that won the 2015 Nobel Prize for medicine
Conflict and survival: Biology photo awardPhotos shortlisted for Royal Society of Biology prize
The greenest island in the world?The island hoping to become the greenest in the world
Is there life on Mars?Evidence is growing that there might have been some once
Plastic oceans: What do we know?Why charging for carry bags is probably a good idea
The Martian: A 'love letter to science'Matt Damon gets marooned on Mars

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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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