Wessa.net - Free Statistics and Forecasting Software (Calculators) v.1.1.23-r6

Wessa.net offers these software applications free of charge:

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

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.

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.

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

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.

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.

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).

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.

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.


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.

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.


Sample Size Software	(sample size, sample accuracy, confidence interval)

Factor Analysis	(Factor Analysis, Principal Components)

Clustering Software	(Agglomerative Nesting, Hierarchical Clustering)

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.

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...)


NEWS FEED from BBC News : Science and Nature
Consortium wins big weather prize	A Franco-German consortium will enter into negotiations for a 1.3bn-euro contract to build Europe's next weather satellites.

Ice mission given lift-off date	Europe's Cryosat spacecraft is set to launch on 8 April on a mission to map the world's ice fields.

LHC smashes energy record again	The Large Hadron Collider has smashed the record for highest-energy particle beams again in its quest to uncover new physics.

Velociraptor's cousin discovered	Researchers discover a new species of dinosaur that was very closely related to the Velociraptor.

Glowing fly sperm yields results	US researchers using genetically engineered fruit flies with glowing sperm track the seed's progress inside the female in real time.

Brain probe hope for epileptics	A US study says electrical deep brain stimulation is a promising therapy for epileptics who do not respond to drug treatment.

Fears winter harmed UK wildlife	The harsh winter may have had a devastating impact on UK wildlife, British Waterways warns as it launches its annual survey.

Bid in for 132-turbine wind farm	Plans for a major wind farm development in Dumfries and Galloway are submitted to the Scottish government.

Now you see it: scientists create invisibility cloak in 3-D	Scientists create the first cloaking device to render an object invisible in three dimensions.

Guess who's a sucker for high-definition television? The octopus	Octopuses respond to high-definition television (HDTV), but seem to ignore normal standard television, scientists discover.

Richard Black on what's happening to our shared environment

Spaceman	When Britain had a small astronaut corps

Gold rush	The oceanic fight over the future of prized bluefin tuna

Weed invasion	The creeper that is smothering an ecosystem

In pictures	Behind the scenes at London's Natural History Museum

Earth Watch	Tuna defeat carries whiff of cordite and hypocrisy

Subconscious sell	Can brain scanning tell companies how to sell us more?

It's still real and it's still a problem	More reason than ever to deal with the climate debacle

On the arrival of alien predators	Europe is set to release its first non-native "biological control" species to curb the spread of Japanese knotweed.

Flat-headed cat is now endangered	Habitat loss and deforestation are now endangering the survival of Asia's flat-headed cat, a diminutive and little studied feline species.

In pictures: Arctic peril	Populations of many species living in the high Arctic have declined by one quarter, according to a new assessment.

'Hobbit' island's deeper history	New tool discoveries push back the date for the earliest human occupation of Flores Island, home of the famous hobbit species.

Planck spies massive dust clouds	Europe's Planck space telescope pictures the colossal swathes of cold dust that spread through the Milky Way galaxy.

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.

Limits of quantum world stretched	Scientists have created the largest-ever "quantum state", a result that has implications for quantum physics and computing.

UN body rejects bluefin tuna ban	A US- and EU-backed bid to ban trade in Atlantic bluefin tuna fails, raising fears for the species' future.

Monkeys learn more from females	Groups of monkeys pay more attention to females than to males when learning a task, say scientists.

Ads 'exaggerated climate change'	Two government press adverts aimed at raising awareness of climate change are banned for overstating the risks.

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.

'Milestone' for wave energy plans	Seven companies are to push forward plans to generate 1.2 gigawatts of electricity from wave and tidal power.

::Free Statistics and Forecasting Software::

:: Free Statistics Software (Calculator) - Web-enabled scientific services & applications ::

Wessa.net offers these software applications free of charge: