| 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 |
| Cockroaches evolving to evade traps | Cockroaches are outsmarting our efforts to kill them by evolving to avoid the taste of sugar traps, a study reveals. |
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| Genetics of white tigers pinpointed | Chinese scientists trace the rare white colouration in Bengal tigers to a single change in a gene that affects a host of animals, including humans. |
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| Richard III buried in 'untidy grave' | The remains of King Richard III, discovered under a city car park, were buried in a "hastily dug, untidy grave", researchers reveal. |
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| Barrick Gold fined for Chile project | Chilean authorities fine the world's largest gold mining company, Barrick Gold Corp, more than $16m for environmental offences at an Andean mine. |
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| Iceland expands volcano monitoring | Installation is under way of an expanded monitoring system for Iceland's volcanoes, which it is hoped will give the world more warning of the next big eruption. |
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| Nasa to lease shuttle launch pad | Nasa is looking for commercial operators to lease a historic launch pad in Florida used for the first Moon missions and by the space shuttles. |
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| Trans-US solar plane sets new record | The Solar Impulse plane sets a new record for distance flown by a solar-powered craft as it completes the second leg of a bid to cross the US. |
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| Ecuador satellite space crash fears | Space engineers in Ecuador are trying to establish if the country's only satellite has been damaged in a crash with space debris. |
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| Cave paintings uncovered in Mexico | Archaeologists in Mexico find 4,926 cave paintings in red, yellow, black and white in the north-eastern region of Burgos. |
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| Feet home to more than 100 fungi | Fungi live all over the human body but their favourite spots are the heel, under toenails and between the toes, according to a US study. |
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| Climate 'spurred human innovation' | Abrupt climate change in Africa helped trigger technological and cultural advances in early modern humans, according to new research. |
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| Ospreys first in England to hatch | Leicestershire and Rutland Wildlife Trust capture osprey chicks hatching on camera for the first time. |
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| Wildcat extinction 'in 24 months' | A scientist who has developed a genetic test to identify pure Scottish wildcats says the species could be extinct within two years. |
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| Iodine lack 'may lower UK baby IQs' | Mild iodine deficiency during pregnancy could be dimming the intellect of some babies born in the UK, say researchers who studied 1,000 families. |
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| Vitamin C can kill drug-resistant TB | Vitamin C can kill multidrug-resistant TB in the lab, scientists reveal. |
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| Irish potato famine pest identified | Scientists have used plant samples collected in the 19th Century to identify the pathogen that caused the Irish potato famine. |
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| Vaccine developed for farm disease | A vaccine to protect sheep and cattle from a livestock virus spread by midges has been approved by government vets. |
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| Rover drills second rock sample | Nasa's Curiosity Mars rover drills a second sample of Martian rock to deliver to its onboard laboratories for analysis in the coming days. |
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| UK astronaut given station date | UK astronaut Tim Peake is to fly to the International Space Station, launching on a Soyuz rocket in November or December 2015. |
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| 'Worrying declines' for UK species | A stocktake of UK nature suggests 60% of animal and plant species studied have declined in the past 50 years. |
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| Green light for 'biggest' wave farm | Plans for the world's largest commercial wave farm off the Western Isles move forward after minister give full consent for the project. |
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| 2013 cold start may mean fruit boom | UK fruit growers could enjoy a much better harvest of apples and pears this year, following the dismal crop in 2012, experts believe. |
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| Fifty-five beaches meet new rules | Fifty five beaches in England meet tough new EU standards on water quality to achieve Blue Flag awards. |
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| Flightless penguin puzzle 'solved' | The underwater prowess of the penguin may have cost the bird its ability to fly, scientists believe. |
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| Ant abilities could aid robot design | A study showing how ants tunnel their way through confined spaces could aid the design of search and rescue robots, say scientists. |
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| VIDEO: 'Tough times for toads' | A "stocktake" of UK nature suggests 60% of animal and plant species have declined in the past 50 years - and one in 10 could end up disappearing. |
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| First crane egg in 400 years laid | A nesting crane lays the first egg laid by that breed of bird in southern Britain in more than 400 years. |
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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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| VIDEO: Turtle rescued after swallowing plastic | An injured turtle found by a fisherman in Florida has been returned to the sea after being treated at a rescue centre. |
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| VIDEO: 'Worrying declines' for UK species | A major new report from 25 wildlife organisations, assessing the state of Britain's Nature, is warning that many species of wildlife are facing extinction in the UK unless urgent action is taken. |
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| VIDEO: Journey into an Icelandic volcano | Dr Freysteinn Sigmundsson shows the BBC's Neil Bowdler around the Thrihnukagigur volcano in Iceland. |
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| AUDIO: Attenborough: We're destroying things | David Attenborough examines news that a "stocktake" of UK nature suggests 60% of animal and plant species have declined in the past 50 years - and one in 10 could end up disappearing. |
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| VIDEO: Cockroaches evolve to beat traps | A mutant strain of cockroach that can outsmart the sugar traps used to kill them has evolved, scientists in the US have found. |
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| VIDEO: 'First crane egg in 400 years' | The first crane egg in southern Britain in more than 400 years has been laid by a nesting bird. |
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| VIDEO: Ant engineering seen in slow motion | Detailed slow-motion footage showing how ants tunnel their way through confined spaces could aid the design of search and rescue robots, say scientists. |
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| AUDIO: Space travel is 'logistical nightmare' | Colin Pillinger, famous for the "Beagle 2 Mars" mission, says the value of sending astronaut Tim Peake into space "should not be underestimated". |
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| Viewpoint: Mars - what we've learnt in five years | What we have learnt from Martian probes |
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| Bloodhound diary: Rolls of advice | The suspension component that could support a full grid of F1 cars |
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| Residents revel in straw bale homes | Leeds residents move into their new eco-friendly straw dwellings |
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| Can science be kick started? | Could attempts to crowd-fund research skew science? |
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| Just how bad is an EF5 tornado? | Oklahoma tornado upgraded to an "EF5" - but what does that mean? |
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| How the men from the ministry saved England's heritage | How historic UK sites were saved from destruction |
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| Gunboat diplomacy and Crofters' War | How gunboat diplomacy led to attempts at land reform |
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| Can China become a hi-tech economy? | Can China harness its millions of cheap graduates? |
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