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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
Killer frog disease hits MadagascarA devastating disease that has wiped out amphibians around the world has been discovered in Madagascar, scientists report.
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.
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.
'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.
MPs call for reform of GM crop rulesEurope's approval system for GM crops is "fundamentally flawed" and should be overhauled, say MPs.
Machine learns to play video gamesA machine inspired by the human brain has learned how to play 49 classic Atari video games - a step towards self-thinking robots, scientists say.
Solar loses out in renewables auctionThe results of the UK government's first auction for renewable energy subsidies are a boost for offshore wind, with solar the biggest loser.
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".
Europe's 'Landsat' ready for launchThe "workhorse" satellite in Europe's new multi-billion-euro Earth observation programme is built and ready to go into orbit.
'Invest more' in protected areasThe world's national parks and nature reserves receive eight billion tourist visits a year, generating around $600bn of spending, according to research.
Russia extends space station roleRussia commits itself to operations on the International Space Station until 2024, matching the intentions of the Americans.
Dutch town terrorised by rogue owlResidents of the Dutch town of Purmerend are advised to take umbrellas out at night after a rogue owl leaves man requiring stitches to head wounds.
Call for global single-use syringesSmart syringes that can be used only once should be used for injections, the World Health Organization has announced.
Bionic research project gets £1.4mA new generation of bionic limbs could be the result of research being led by scientists at Newcastle University.
VIDEO: Brain-controlled drone shown offA drone specialist in Portugal demonstrates a flight controlled by human brainwaves, and suggests a future of large-scale unmanned flying.
Black hole's blast stunts starsThe winds blasted out by supermassive black holes at the centre of galaxies are strong enough to slow the birth of new stars, astronomers reveal.
Mystery Mars haze baffles scientistsScientists struggle to explain a vast haze that was spotted high above the Martian surface in 2012 by amateur astronomers.
UN climate head Pachauri resignsThe head of the United Nations climate change panel, Rajendra Pachauri, steps down amid sexual harassment allegations he denies.
Kew announces new science plansKew Gardens, which is facing an annual £5m budget deficit, announces its new science strategy.
Robins' nighttime singing probedA new project at Glasgow University aims to help resolve why robins are up all night singing in cities.
'Next Pinatubo' a test of geoengineeringScientists who study geoengineering say Earth's next major volcanic eruption will be a good test of whether the intervention technique might help mitigate global warming.
Threatened birds of prey 'vanish'Two of the rarest birds of prey in England, which had been satellite tagged, vanish in unexplained circumstances.
Hyenas feast at vulture restaurants"Restaurants" of dead meat set up for endangered vultures also attract an undesirable clientele of hyenas and jackals, according to a six-year study.
Brazil releases 'good' mosquitoesBrazilian researchers release thousands of mosquitoes infected with a bacteria that suppresses dengue fever into the environment in Rio de Janeiro.
VIDEO: An eco-system inside your homeThe smart garden that fits inside your house and provides fresh healthy food
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.
VIDEO: 'Supertides' to hit UK coastlineThe biggest high tides in two decades are expected to hit parts of the UK coast this morning, which could see coastal flooding in areas.
VIDEO: ISS spacewalk prepares for touristsTwo astronauts spend six hours installing new cabling on the outside of the International Space Station.
VIDEO: Rare Amur tigers filmed in ChinaRare video footage of wild Amur tigers in China has been captured in the Wangqing Nature Reserve.
VIDEO: The onion that doesn't make you cryA British farmer claims to have developed a new variety of red onion which does not cause people to cry when it is chopped.
VIDEO: Should killer whales stay in parks?The debate continues over whether killer whales should be kept in captivity in theme parks.
Nuclear power: The future or the past?Has nuclear power had its day, asks Richard Anderson.
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
Healthy dose of hope for one-use syringesCould a new "auto-disable" syringe help stem HIV outbreaks?
Cannabis: Promise, risk and controversyThe light and dark side of a controversial drug
The farmer's son who filmed a snow leopardA farmer's son sacrificed his sheep to film a leopard
Creating ColdThe men who made the world a cooler place to live
What exactly is 'game theory'?What is it and why does it matter so much?
Hubble's star refuses to fadeHubble's star refuses to fade away

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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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