Wessa.net - Free Statistics and Forecasting Software (Calculators) v.1.1.23-r3

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 : Statistical Research
Brain tumours 'forgotten cancer'	More funding needs to be ploughed into research into the "forgotten cancer" of brain tumours, campaigners say.

Smoking curbs: The global picture	The BBC News Website traces the recent wave of smoking bans around the world as governments try to stub out the habit.

Pension closures 'save billions'	Employers in the UK have saved themselves £4.5bn a year by closing their final salary pension schemes.

Alcohol 'kills one in 20 Scots'	Alcohol may have caused the death of twice as many Scots as previously thought, an NHS study finds.

Digital TV now in 90% of UK homes	Digital video recorders are proving popular in UK homes, finds research from watchdog Ofcom.

Alcohol link to one in 25 deaths	One in 25 deaths across the world are linked to alcohol consumption, Canadian experts have suggested.

What is the most popular day to get married?

Salads 'rival Big Macs for fat'	Some supermarket pre-packed salads are higher in calories and fat than a Big Mac and fries, a report warns.

Stillbirths 'starting to fall'	The proportion of babies born dead has fallen for the first time since 2000, an independent report has shown.

'Patchy' diabetes services worry	There are worries that too few diabetics in Wales are attending classes to help manage their condition.

Arabic blogosphere begins to bloom	Bloggers in many Arabic nations are have a big impact on national debates, finds a study of more than 35,000 blogs.

Just click for a century of news	The British Library puts two million pages from 19th century newspapers online, taking research out of its reading rooms into people's homes.

Scottish unemployment up 41,000	Latest figures show that unemployment in Scotland has gone up, with the number out of work standing at 176,000.

Care issues factor in baby deaths	Under-resourced maternity services are contributing to the deaths of almost 300 babies in Wales each year, a report says.

A-levels 'too much like sat-nav'	A-levels have become "hollow preparation" for university, by undermining independent study and original thought, claims a think tank.

Wealth 'boosts breast test rate'	Wealthier women are the most likely to take up breast screening, but ethnicity rather than money affects whether to have a cervical smear, a study shows.

China 'unfairly seen as eco-villain'	China's insatiable appetite for resources has led to the nation being unfairly portrayed as the world's biggest environmental villain.

'Masked variation' of job losses	The effect of the recession on local areas in England and Wales is masked by general job loss statistics, say councils.

'Urgent' birth care review needed	Researchers call for an urgent review of the way births in the UK are handled after comparing the success of NHS and private midwives.

UK output sees surprise increase	UK industrial output rose in April as a respected think tank says that the UK is over the worst of the recession.

::Free Statistics and Forecasting Software::

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Wessa.net offers these software applications free of charge: