| 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 |
| Deep sea 'gold rush' moves closer | The prospect of a deep sea "gold rush" opening a controversial new frontier for mining on the ocean floor has moved a step closer. |
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| Expert issues UK tree threat warning | A tree expert says the biggest threat facing UK trees is likely to come from a disease currently unknown to science. |
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| GPS 'improves early tsunami alerts' | GPS data could provide faster and more accurate early warning systems for tsunamis, a German team of scientists suggest. |
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| The Ice Age giants of North America | Scientists get their hands dirty as they attempt to unravel the mystery of giant Ice Age beasts like the sabretooth cat. |
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| Alien invaders wage 'biological war' | An Asian insect is destroying native species around the world by unleashing a lethal biological cocktail. |
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| Late arrival for rare butterflies | The UK's spring butterflies are being welcomed by enthusiasts, but weeks later than they usually arrive. |
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| Nasa buys into 'quantum' computer | A $15m computer that uses "quantum physics" effects to boost its speed is to be installed at a Nasa facility. |
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| Space life 'too good not to share' | Canadian astronaut Chris Hadfield says he could not resist sharing his life in space on social media, in his first public appearance since landing. |
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| Most distinct species mapped | For the first time scientists have developed a map that shows the world's unique and endangered species. |
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| Fresh protests over Kunming plant | Protesters take to the streets of Kunming in China for the second time this month over plans for a chemical plant. |
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| Milestone in medical human 'cloning' | Human cloning is used to produce early embryos, marking a "significant step" for medicine, say US scientists. |
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| Nasa's Kepler telescope breaks down | The planet-hunting space telescope, Kepler, has been hobbled by a broken reaction wheel, say scientists at Nasa. |
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| Malaria parasite 'controls mosquito' | Mosquitoes carrying the malaria parasite are more attracted to human body odour than uninfected insects, scientists report. |
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| Barefoot running injury concern | The trend for barefoot running could lead to injuries in some runners, a small study suggests. |
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| Neutrinos spark 'new astronomy era' | Researchers spot particles called neutrinos coming from outside our Solar System for the first time, a find that could spark a new era in astronomy. |
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| Ancient water found in Canadian mine | Scientists say 1.5-billion-year-old water drilled from rock in a North American mine is the most ancient yet found on Earth. |
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| UK company withdraws death row drug | A UK-based firm says it has stopped selling a drug to Arkansas because the US state had planned to use it to execute prisoners on death row. |
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| Clue to why women live longer | Women live longer than men partly because their immune systems age more slowly, a study suggests. |
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| DNA reveals origin of Minoan culture | Europe's first advanced civilisation had a local origin and was not imported from outside the continent, according to a new study. |
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| Four colossal Sun flares in 48 hours | The Sun has unleashed the most powerful eruption - a solar flare - of 2013 so far. |
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| UK claims fish dumping ban success | The UK says it has agreed new laws with the European Union which include banning the dumping of unwanted fish, such as mackerel and herring. |
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| Tigers 'lacking variety' in mates | India's tigers face extinction due to a collapse in the variety of their mating partners, say Cardiff University researchers. |
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| 'Best estimate' of melting ice caps | Experts have come up with their most accurate estimate yet for the impact of melting ice sheets and glaciers on sea level. |
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| 'Mystery' condition hits sugar crops | Sugar beet farmers are counting the cost of a "mystery" condition resulting in more than 50% of some crops failing. |
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| Tropical trees keep turbines turning | New research suggests that cutting down trees in the rainforest could limit the amount of electricity generated by hydropower. |
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| Mayan pyramid destroyed in Belize | An ancient Mayan temple in Belize has been destroyed by a road-building crew using bulldozers and backhoes to extract gravel for road filler. |
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| Farne Islands 'puffin census' starts | A three-month long study to determine the puffin population on the Farne Islands in Northumberland gets under way. |
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| Black widow spider found in Aberdeen | A black widow spider is found in Aberdeen in a shipment from America. |
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| Can giant eagles spread their wings? | The reintroduction of white-tailed eagles to Britain has been hailed as a conservation success, but will they ever fly beyond Scotland? |
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| VIDEO: Inside the human robot factory | Roboticist Will Jackson of Engineered Arts gives a tour of his robot factory in Cornwall, and talks about recent developments in the industry. |
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| VIDEO: Chile coast littered with dead animals | Hundreds of birds and marine animals wash up on the Chilean coast, raising fears fishermen might be flouting a ban on blast fishing. |
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| VIDEO: Ghana students aim for orbit 'by 2016' | Students in Ghana launch a model of a satellite attached to a balloon for the first time. |
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| VIDEO: Hadfield 'hit Earth like a car crash' | Canadian astronaut Chris Hadfield has been talking about his experiences on the International Space Station in his first public appearance since returning to Earth. |
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| AUDIO: Has global warming stalled? | Has global warming plateaued? As the critics say, the past decade has seen hardly any change in global air temperatures. If warming has stalled, what are the implications for climate change policy? The BBC's environment analyst Roger Harrabin reports. |
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| VIDEO: Malaria mosquitoes 'quicker to bite' | Mosquitoes carrying malaria are more attracted to human scent than non-malarial ones, research has suggested. |
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| VIDEO: A look inside the teenage brain | British scientists are scanning the brains of 300 young people between the ages of 14 and 24 to try and understand how the brain is rewired as teenage years give way to maturity. |
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| VIDEO: Islands start 'puffin census' | A "puffin census" has started on the Farne Islands in Northumberland, with National Trust rangers surveying how many breeding pairs of the birds live there. |
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| In pictures: Raw power of the Sun | The raw power of the Sun as it unleashes the strongest radiation storms yet seen in 2013 |
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| China joins Arctic 'coldrush club' | Rush to join Arctic Council reflects growing importance of the region |
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| French farms feeling the pinch | French agriculture starts to feel effects of deteriorating economy |
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| Google Glass - cool or creepy? | BBC correspondent tries out Google's smart glasses |
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| Big picture: Belated bluebell bloom | Belated bluebell bloom |
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| Viewpoint: The desecration of bodies in war | Why do people mutilate bodies in war? |
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| How effective was the Dambusters raid? | Did the Dambusters raid really shorten World War II? |
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| Sea levels rising - but how quickly? | Sea levels are rising - but how quickly? |
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| Study to understand teenage brain | Trying to understand the adolescent brain |
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| Nasa's job is not to 'titillate' | Will the space station ever justify its existence? |
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