| 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 |
| Scientists to review climate body | The UN secretary general asks the world's leading science academies to review the UN's climate science body. |
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| Japan protest over tuna ban plan | Japan voices opposition to a proposed ban on international trade in bluefin tuna, after the EU backs the plan. |
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| Half-cock chicken mystery solved | Researchers in Edinburgh say they have solved the mystery of why some chickens hatch out half-male and half-female. |
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| Ring may be giant 'impact crater' | Deforestation has revealed what could be a giant impact crater in Central Africa, according to Italian scientists. |
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| EU to back bluefin tuna trade ban | EU nations decide to support a ban on international trade in Atlantic bluefin tuna until stocks recover. |
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| Ancient eggshell yields its DNA | The eggshells of long-dead and extinct species are a particularly good source to find preserved DNA, researchers say. |
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| Science 'is a key election issue' | The science spokesmen of the three main political parties cross swords on the issue of UK research funding. |
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| Collider to shut for year to fix faults | The Large Hadron Collider must be shut down for a year starting in late 2011 to address design flaws, the BBC has learned. |
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| World's largest meat-eating plant prefers to eat... small animal poo | The largest meat-eating plant in the world is designed not to eat small animals, but small animal poo, scientists discover. |
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| Lighting a fuse just millionths of a millimetre across makes a battery | A never-before-seen reaction in nanotubes could make for batteries that pack a mighty punch, say researchers. |
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| Richard Black on what's happening to our shared environment | |
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| Earth Watch | Will review of UN climate change body be unbiased? |
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| Galapagos tension | Can all species live side by side in unique ecosystem? |
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| Farming future | The dawning age of the agricultural automatons |
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| Harrabin's Notes | Environmentalists and the EU lock horns over biofuels |
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| Parched island | Politicians look away as Cyprus dies of drought |
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| Spaceman | UK Skynet: Not to be confused with The Terminator |
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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: Bear power | The European brown bear's love of electricity and telegraph poles is helping scientists gain new insights into its behaviour. |
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| Starling flock 'falls from sky' | Mystery surrounds the deaths of 75 starlings which fell from the sky on to the driveway of a Somerset house. |
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| Skynet satellite system extended | Skynet 5, the UK's single biggest space project, is to get a fourth satellite to up the bandwidth available to British forces. |
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| Lords in science investment call | Former Labour and Conservative science ministers challenge the next UK government to maintain investment in science. |
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| Tory review urges science boost | A Tory-backed report urges incentives for schools and tax breaks for researchers to raise the profile of science. |
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| Probe hints at cosmic dust | Scientists may have identified the first specks of interstellar dust in material collected by the Nasa Stardust spacecraft. |
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| Panel confirms dino crater link | An international panel of experts has endorsed the idea that an asteroid impact killed off the dinosaurs. |
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| Third of EU emissions 'imported' | Research shows some EU countries "import" about a third of their carbon emissions from developing countries. |
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| Superweed predator on UK trial | A plant-eating predator that preys on aggressive superweed Japanese knotweed is to be given a trial release in England. |
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| Bonobos opt to share their food | One of our closest primate relatives, the bonobo, prefers to share its food rather than dine alone, scientists report. |
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| 'Case stronger' on climate change | The UK Met Office says evidence that human activity is causing climate change is stronger now than in a 2007 assessment. |
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| Lough eel numbers 'on the brink' | There are growing concerns about the future of the Lough Neagh eel fishery and the hundreds of jobs it supports. |
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