| Descriptive Statistics Software | This 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
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| Regression Software | This 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).
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| Statistical Distributions | Features 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.
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| Statistical Hypothesis Testing Software | Offers statistical testing of a variety of hypotheses: Population Mean, Mean (critical value, p-value, type II error, sample size), Skewness/Kurtosis, Quasi Random-Walk
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| 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.
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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.
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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.
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| Mathematical Equation Plotter | Plots 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).
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| Time Series Database | Use 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.
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| R modules | Anyone can create, maintain, and publish R-based modules (subject to editorial acceptance) and make them freely available within the Wessa.net framework.
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| 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.
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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.
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| Sample Size Software | (sample size, sample accuracy, confidence interval)
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| Factor Analysis | (Factor Analysis, Principal Components)
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| Clustering Software | (Agglomerative Nesting, Hierarchical Clustering)
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| Reproducible Examples | This 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.
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| 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...)
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| NEWS FEED from BBC News : Science and Nature |
| Striking galaxy image from Hubble | The Hubble space telescope captures an image of a "barred spiral" galaxy that could help us better understand our own Milky Way. |
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| Largest optical telescope created | Astronomers at the Paranal observatory combine four telescope to create the world's largest virtual device with a 130m-mirror. |
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| Prince optimistic for fisheries | Prince Charles says there is a reason to be optimistic about the state of the world's oceans, but it is "critically urgent" to tackle overfishing. |
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| Malaria toll 'is twice as high' | The number of deaths worldwide from malaria has been underestimated, according to data published in the medical journal the Lancet. |
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| Brains may be wired for addiction | Abnormalities in the brain may make some people more likely to become drug addicts, according to scientists. |
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| More Galileo satellites ordered | The German-UK consortium building the operational spacecraft for Europe's Galileo sat-nav system wins a contract to provide an additional eight units. |
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| Humble moss 'brought on ice ages' | Research shows that primitive moss-like plants could have helped cool the Earth 470 million years ago, bringing on mini ice ages. |
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| Seagrass age surprises scientists | Meadows of seagrass, a keystone species in marine ecosystems, found in the Mediterranean Sea are likely to be tens of thousands of years old, a study shows. |
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| Mega volcanoes 'may be predicted' | The eruption of some of the largest volcanoes on the planet could be predicted decades before the event, research suggests. |
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| Super-Earth 'could support life' | Astronomers have found a fourth planet with conditions similar to Earth, which they say could support life. |
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| MP's call to pardon 'hero' Turing | An MP tables a motion calling for computer pioneer Alan Turing to be posthumously pardoned over a conviction for gross indecency. |
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| 'Supergiant' found in deepest sea | A huge crustacean called a supergiant - more than 30cm long - has been discovered 7km down in the waters north of New Zealand. |
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| VIDEO: Art by animals goes on show | A work of abstract expressionism by a chimp and a still life of a flower by an elephant are part of a new exhibition in London of artworks created by animals. |
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| Spider sex trick boosts paternity | Some male spiders voluntarily "castrate" themselves during sex in order to increase their chances of fathering offspring, according to a new study. |
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| Science decodes 'internal voices' | Researchers turn brain waves from thoughts of words into actual words, in a breakthrough that could benefit comatose and locked-in patients. |
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| Self-steering bullet researched | US researchers are developing a bullet that guides itself to a laser-illuminated target. But an expert is concerned it may be sold to the public. |
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| Isolated Peruvian tribe pictured | A Spanish archaeologist has snapped the most-detailed pictures ever seen of an "uncontacted" tribe in the Amazon. |
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| Skin transformed into brain cells | Skin cells have been converted directly into cells which develop into the main components of the brain, by researchers in California. |
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| Gorillas grin 'to reassure pals' | Gorillas bare their teeth in a playful "grin" to reassure one another as they play, scientists discover. |
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| Rhino poachers in SA get 25 years | Three Mozambicans are sentenced to 25 years each in a South African court for rhino poaching, according to the South African national parks body. |
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| 'Big cat' theory ruled out by DNA | Scientists fail to find any evidence that "big cats" killed two roe deer found dead in Gloucestershire. |
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| Spider web's strength explained | Explaining the remarkable strength of spiders' webs |
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| Ancient giant crocodile discovery | 'Shieldcroc' is an ancient, extinct crocodile that's been discovered by scientists studying fossils in Missouri in the US. |
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| Canada firm halts Argentina mine | After protests by Argentine environmental campaigners, a Canadian mining firm is suspending its exploration work on a project in La Rioja province. |
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| Search for Cuba offshore oil begins | Search begins for Cuba's offshore oil deposits |
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| Pythons link to mammals decline | Non-native Burmese pythons are the likely cause of a severe decline in mammals living in Florida's Everglades region, a study suggests. |
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| Search for black squirrels begins | Scientists want the UK public to report their sightings of black squirrels, in order to estimate the rate at which they are spreading. |
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| In pictures: How elephants cool off | Thermal images reveal how Asian elephants cool off by directing heat to their trunks overnight. |
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| VIDEO: 'Green' tour of London Olympics site | A look around the site of what is pledged to be the "greenest ever" Olympic Games. |
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| VIDEO: Lifting the Cutty Sark into place | The historic tea clipper will be reopened to the public in spring 2012. Part of the conservation work included lifting her 3m off the ground. |
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| VIDEO: Science converts thoughts into speech | Scientists have unveiled a new technique for decoding human brainwaves and then converting them into speech. |
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| VIDEO: How do you weigh a polar bear? | Staff at Highland Wildlife Park are trying to weigh Walker the polar bear who is thought to be about 400kg (63 stone). |
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| VIDEO: Thai poachers target elephants for meat | Thailand's wildlife experts say that elephants could face extinction if they continue to be hunted as a source of meat. |
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| VIDEO: Bats find shelter in Israeli bunkers | Bats are finding a surprising haven in abandoned Israeli bunkers, researchers say. |
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| AUDIO: Bus-sized asteroid to pass by Earth | Astronomers are watching for an asteroid the size of a double-decker bus which will pass within 70,000km of Earth on Friday. |
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| Totally tropical at Kew | A tour of Kew's Royal Botanic Gardens' exotic orchids |
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| Green void looms after Huhne departure | What Huhne’s departure means to 'the greenest government ever' |
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| Olympics shoot for green medal | Will London 2012 fulfil its ‘greenest Olympics’ pledge? |
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| In pictures: Science meets art | Winners of science photography contest dazzle |
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| Analysis: Pharmaceutical woes | Why the pharmaceutical industry is under pressure |
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| Strangford life | Wildlife, landscape and heritage of Strangford Lough |
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| Meet the galanthophiles | The strange world of snowdrop fanciers |
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