Wessa.net - Free Statistics and Forecasting Software (Calculators) v.1.1.22-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...)

XML-RPC PHP client	(This internet technology allows you to make Remote Procedure Calls (via XML and Http) to our statistics servers. You can build new applications by calling our statistical algorithms over the net. We have included open source PHP client samples for your convenience.)

NEWS FEED from BBC News : Statistical Research
Half city's youth 'take cocaine'	More than 50% of young people in Liverpool admit to having taken cocaine, a new report claims.

Paediatricians' GMC case delayed	The General Medical Council wins a delay in an investigation into the work of paediatrician David Southall allowing it to assess new evidence.

Adults with autism to be audited	For the first time the government is to calculate the number of adults with autism in England.

Economic data 'credibility boost'	Scotland could get an international "credibility boost" by introducing a new measure of Gross Domestic Product, a report says.

Cod fall may speed 'toxic tide'	Declining fish stocks could be partially responsible for algal blooms in parts of the oceans, researchers find.

Green movement forgets its politics	Why climate campaigners should stop trying to persuade people into lifestyle changes and start dealing with the politics.

Taking the pulse of the economy	At times of economic volatility, sentiment surveys are headline news. But is it really possible to measure the feel-good factor accurately?

Targets 'drive out head teachers'	School leaders are being driven out of the profession by "pernicious systems of accountability", head teachers say.

Poland entices its workers home	There are signs that many Poles who migrated for better paid jobs abroad have gone home. Two returnees tell their stories.

India warned over heart disease	India will account for 60% of heart disease cases worldwide within two years, says a new research.

Recorded crime decreases by 12%	Recorded crime in England and Wales fell by 12% in the last three months of 2007, Home Office figures show.

What if we all walked to work?	It's Walk to Work Day, but what would Britain be like if we all passed up road and rail for the humble pavement? Steve Tomkins ponders the potential consequences of letting our legs do all the work.

Probation Service 'faces crisis'	The Probation Service faces a crisis of shrinking budgets and a shortage of frontline staff, says a new report.

Scottish growth outperforming UK	Latest Scottish government figures show the Scottish economy outperforming the rest of the UK in Q4 2007.

Rural towns new 'creative hubs'	Rural towns are the fastest growing centres of creativity, according to a new business league table.

Breast checks 'benefit over-70s'	Women should be screened for breast cancer up to the age of 75, a study of over 860,000 women suggests.

Younger children disciplined less	Academics say their research confirms the belief that parents are often tougher on their oldest children.

Ageing issue 'ticking time bomb'	A new group is set up to study the financial implications of the UK population living longer.

'Drop' in drink-fuelled violence	A study suggests community projects to cut binge drinking have led to a 10% fall in violent crime in Glasgow.

China 'now top carbon polluter'	China has already overtaken the US as the world's biggest polluter, according to a new report by US scientists.

::Free Statistics and Forecasting Software::

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

Wessa.net offers these software applications free of charge: