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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
Scientists produce TB-resistant cowsResearchers in China produce a herd of genetically engineered cows that are better able to ward off bovine TB.
Ministers issue spaceport shortlistSix aerodromes remain on the list to become the UK's first commercial spaceport.
New Higgs detection 'closes circle’Physicists have detected a version of the Higgs Boson in a superconductor, but say this cannot substitute for the work of the LHC.
Rosetta catches its own shadowThe Rosetta satellite sees its own shadow in the highest resolution image it has so far taken of Comet 67P.
Coffee linked to 'cleaner' arteriesDrinking a few cups of coffee a day may help people avoid clogged arteries - a known risk factor for heart disease - South Korean researchers believe.
Bright spotlight on Ceres missionAs Nasa's Dawn satellite prepares to enter into orbit around the dwarf planet Ceres, scientists say they are excited to learn more about the two bright spots on its surface.
DNA documents ancient mass migrationDNA analysis has revealed evidence for a massive migration into the heartland of Europe 4,500 years ago.
UK to pioneer lagoon power plantsPlans to generate electricity from the world's first series of tidal lagoons are unveiled in the UK, with sites proposed in Wales, Somerset and Cumbria.
Signs of spring 'shifting' in treesScientists say climate change will lead to a shift in the timing of when trees come into leaf in British woodlands.
First tree seeds for Doomsday vaultThe Svalbard "Doomsday" seed vault, which protects the world's food crops, accepts its first consignment of seeds from forest tree species.
SpaceX launches electric satellitesUS rocket company SpaceX performs a dual-launch of all-electric satellites - what is expected to become a big trend in future spacecraft design and deployment.
'Exquisite' gravity probe leaves UKUK industry completes construction of the modules that make up the Lisa Pathfinder satellite - a remarkable probe that will test the key technologies needed to detect gravitational waves in space.
Wheat present in UK 'for 8,000 years'Fragments of wheat DNA suggest wheat was present in Britain 8,000 years ago, long before it was grown by British farmers.
Bloodhound car begins to take shapeGood progress is being made on construction of the world's fastest car - the Bloodhound supersonic vehicle, which aims to run at over 1,000mph.
Google camera zips along rainforestGoogle flew one of its Street View cameras down a zip wire in the Amazon rainforest to capture new images of the forest canopies.
Fungus plays 'biomusic' duetScientists at Plymouth University play improvised pieces of music with the help of slime mould.
Killer frog disease hits MadagascarA devastating disease that has wiped out amphibians around the world has been discovered in Madagascar, scientists report.
Bionic research project gets £1.4mA new generation of bionic limbs could be the result of research being led by scientists at Newcastle University.
Call for global single-use syringesSmart syringes that can be used only once should be used for injections, the World Health Organization has announced.
Lords call for UK Arctic ambassadorThe United Kingdom should create an ambassador for the Arctic or risk being pushed out of key decisions for the region, a House of Lords report says.
US sea level rise 'very unusual'Sea levels along the northeast coast of the US rose dramatically during 2009-2010 in an event scientists describe as "very unusual".
'Concern' over bugs in shop chickenConcerns are growing about antibiotic resistance of bacteria carried by poultry, according to a new report.
Giant caiman packed fierce biteA team of Brazilian scientists says they have calculated that the bite of a giant prehistoric caiman was twice has strong as that of a T-Rex.
VIDEO: Weasel on bird photo 'extraordinary'Wildlife expert and BBC presenter Lucy Cooke explains what an extraordinary feat it was to have captured a weasel riding on the back of a green woodpecker.
VIDEO: Baby orangutans need new mumStaff are hoping two Sumatran orangutans will find new mothers at Monkey World Ape Rescue Centre in Dorset.
VIDEO: Astronauts brave week's third spacewalkTwo American astronauts have ventured out on a spacewalk for the third time in a week, to install cables on the International Space Station.
VIDEO: An eco-system inside your homeThe smart garden that fits inside your house and provides fresh healthy food
VIDEO: How tidal lagoon power plants workThe BBC's Roger Harrabin has been to the site of one of six tidal lagoons planned in the UK to see how it would work.
VIDEO: Bionic eye will 'restore sight'Scientists at a North East university are working to help "restore sight" to people who have lost their eyes.
VIDEO: Global sinkholes explained - in 60 secsA brief look at some of the biggest sinkholes in recent history.
VIDEO: Finger on the pulse of bionic researchScientists at the University of Newcastle are using microchips as fine as human hair to produce a prosthetic hand.
Lucky Earth survived cosmic pinballHow Earth survived through violent times
Weasel rides on woodpecker's backThe weasel riding on the back of a woodpecker
How do you solve a problem like the 'Beefalo'?The hybrid animal causing havoc in the Grand Canyon
Are humans getting cleverer?Are people getting more intelligent?
Nuclear power: The future or the past?Has nuclear power really had its day?
The man who invented the dinosaurRemembering the man who invented the dinosaur
Is the world ready for GM animals?Is the world ready for modified mosquitoes?
Waiting for the seaThe desert that may one day become water again
In pictures: Vintage Nasa photographs for saleA collection of vintage Nasa photos is set for auction

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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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