| Descriptive Statistics Software | The Free Statistics Calculator 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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| Multiple Regression Software (R module) | Performs Multiple Regression Equation Modeling based on the R language for statistical computing. In future, this module will replace the old C-based version.
Several types of regression will be available in future.
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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
| This section contains various types of Statistics Software for Statistics Education that have been created by Larry Weldon, Simon Fraser University, Vancouver, Canada.
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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 |
| Planck spies massive dust clouds | Europe's Planck space telescope pictures the colossal swathes of cold dust that spread through the Milky Way galaxy. |
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| New exoplanet like 'one of ours' | A new temperate planet, found 1,500 light-years away from Earth, has similarities to planets within our own Solar System. |
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| Limits of quantum world stretched | Scientists have created the largest-ever "quantum state", a result that has implications for quantum physics and computing. |
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| Monkeys learn more from females | Groups of monkeys pay more attention to females than to males when learning a task, say scientists. |
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| 'Arrogance' undid climate talks | The "disappointing" outcome of December's UN climate summit was largely down to rich nations not listening, says Lord Stern. |
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| Ads 'exaggerated climate change' | Two government press adverts aimed at raising awareness of climate change are banned for overstating the risks. |
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| Africans 'take blame for climate' | Many Africans blame themselves for climate change despite relatively low emissions from the continent, a survey of 1,000 people suggests. |
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| Crimean ship found off Balaclava | Ukrainian archaeologists say they have found the HMS Prince, a British naval vessel sunk during the Crimean War. |
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| 'Milestone' for wave energy plans | Seven companies are to push forward plans to generate 1.2 gigawatts of electricity from wave and tidal power. |
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| Why the world's fastest car will no longer take off | Engineers designing the world's fastest car believe they now have a solution to stop it flying off the ground. |
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| How the bacteria on our hands could be used in forensics | The bacteria on our hands could be used in forensic identification, in the same way as fingerprints and DNA, say scientists. |
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| Richard Black on what's happening to our shared environment | |
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| Earth Watch | Complex climate message of UK ads and African divinity |
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| In pictures | Behind the scenes at London's Natural History Museum |
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| Springing late | Harsh winter delays this year's spring blooms |
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| Don't give up | More reason than ever to deal with the climate debacle |
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| Beauty and power | What Saturn's rings tell us about the entire Solar System |
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| Powering up | Japan's home fuel-cell tech to take on Europe |
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| Hailing the arrival of alien predators | Europe is set to release its first non-native "biological control" species to curb the spread of Japanese knotweed. |
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| Aboriginal whaling rights slipping | Commercial and political interests are abusing historical whaling rights of indigenous people. |
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| In pictures: Arctic peril | Populations of many species living in the high Arctic have declined by one quarter, according to a new assessment measuring how the wildlife there is responding to environmental change. |
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| Bee swarms follow 'pied pipers' | A few "pied piping" bees trigger swarms, report scientists. |
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| Mars moon Phobos seen in detail | The European Mars Express probe releases new pictures from its close flybys of the Martian moon Phobos. |
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| Blind soldier 'sees' with tongue | A soldier blinded by a grenade in Iraq says his life has been turned around by technology that allows him to "see" with his tongue. |
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| Apollo men on Obama Moon plans | Nasa Moon astronauts tell the BBC President Barack Obama's decision to cancel the US lunar programme is "catastrophic". |
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| Scan 'can distinguish memories' | Scientists say they have been able to tell which past event a person is recalling using a brain scan. |
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| Decapitated group 'were Vikings' | Fifty-one decapitated skeletons found in a burial pit in Dorset were those of Scandinavian Vikings, scientists say. |
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| Toxic troubles for climate 'fix' | Spreading iron in the oceans as a climate "fix" could poison marine mammals and birds, scientists show. |
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| Home improvement 'hitting swifts' | A survey of swifts suggests the species is at risk from improvement work being undertaken on old houses. |
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| Tiger decline 'sign of failure' | Governments need to crack down on the illegal trade in tiger parts if the big cats are to be saved from extinction, the UN warns. |
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| UK responds to EU noise directive | The government has responded to the EU Noise Directive by publishing a long-delayed noise policy statement. |
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| Reindeer body clock switched off | Reindeer have "switched off" their internal body clocks to survive dark winters and light summers in the Arctic. |
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