| 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 |
| Enceladus water story reinforced | The Cassini probe returns yet more data to back up the idea of a sub-surface sea on Saturn's moon Enceladus. |
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| Smartphone keys get quantum trick | A quantum physics trick is set to give smartphones and hand-held devices pressure-sensitive switches and touchscreens. |
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| Shuttle makes final night flight | The US space agency (Nasa) has launched its shuttle Endeavour on a mission to the International Space Station (ISS). |
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| First film of giant deep-sea fish | Scientists film the giant serpent-like oarfish in its natural deep-sea habitat for the first time, as well as the rare manefish. |
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| Genes reveal 'biological ageing' | Scientists say they have pinpointed gene variants that might show how fast people's bodies are ageing. |
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| Dynamic Pluto revealed in images | Images from the Hubble Space Telescope reveal that the icy dwarf planet Pluto undergoes dramatic seasonal changes. |
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| Climate scepticism 'on the rise' | The British public has become increasingly sceptical about climate change, a poll for BBC News suggests. |
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| Dinosaur footprint haul in China | Scientists in China say they have discovered more than 3,000 dinosaur footprints, all facing in the same direction. |
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| Birds that use their feathers like cats use their whiskers | Birds may use their feathers for touch - to feel their surroundings just as cats use their whiskers, scientists find. |
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| Shackleton's whisky dug from South Pole ice | Five crates of Scotch whisky and brandy belonging to polar explorer Ernest Shackleton have been recovered from the ice after a century. |
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| Richard Black on what's happening to our shared environment | |
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| Green pounds | Eco-towns earmarked for government cash |
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| Robo-soldiers | Can 'well-behaved' robots make the battlefield safer? |
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| Spaceman | America ponders the options for a big rocket |
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| In pictures | The troubles faced by the world's largest amphibian |
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| Sea drifters | Colourful images of plankton in the world's oceans |
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| Computing ace | The computer that laid the foundations of the internet |
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| Copenhagen - the Munich of our times? | The Copenhagen Climate Accord was a "failure of historic proportions" and hardly worth the paper it's printed on. |
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| We cannot buy Earth more time | Global economic growth, in its current form, cannot continue if nations are serious about curbing climate change. |
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| Fur seal colony leaves Galapagos | A group of fur seals have moved from the Galapagos Islands to the warming waters of northern Peru, experts say. |
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| Extraordinary owl preys on sloth | The first evidence of a sloth that has been killed by a owl. |
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| Insects migrate in wind highways | Migrating insects use highways in the sky to speed their journey, according to a study published in Science magazine. |
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| Ancient Indian language dies out | The last speaker of the Bo language in India's Andaman Islands dies at the age of about 85, a leading linguist says. |
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| Scan unlocks vegetative patients | Scientists have been able to reach into the mind of a brain-damaged man and communicate with his thoughts. |
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| Exoplanet gas spotted from Earth | Astronomers have used a new ground-based technique to study the atmospheres of planets outside our Solar System. |
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| Saturn mission 'extended again' | The US space agency (Nasa) has extended the Cassini-Huygens mission to explore Saturn once again. |
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| Russia 'dumped waste in Baltic' | The Russian military dumped nuclear waste into the Baltic Sea in the early 1990s, Swedish media reports say. |
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| Embattled climate chief supported | India gives its full support to embattled climate change chief Rajendra Pachauri, under attack over recent scientific errors. |
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| How spider webs capture water | A new study reveals the structural secrets that allow spider webs to capture water droplets from the air. |
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| Wolverine numbers 'melting away' | A significant decline in predatory wolverines across North America is linked to melting snowpacks, say researchers. |
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| France backs ban on tuna exports | France backs calls for a ban on the global trade in bluefin tuna, the numbers of which have dwindled through overfishing. |
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