Statistics

In most respects SAS sets the standard for breadth of functionality in a statistical analysis suite. However, not everyone needs that level of functionality (or cost), and so here is a list of free alternatives to SAS statistics that many users will find quite adequate. Dataplot is a free, public-domain,…

In the last post on linear regression, I showed how the reassurance we might get from a nice, neatly sloping line, can often be misleading. In this post I want to explore something called Simpson’s Paradox, where an up sloping linear regression can be composed of two down sloping linear…

Monte Carlo Simulation Excel Add-Ins 2015 Monte Carlo Simulation continues to increase in popularity as risk becomes a more pressing issue in many activities. This list of Monte Carlo Simulation Excel add-ins covers varying levels of sophistication and cost – from Risk Analyser at US$49 to others which cost thousands…

Provalis Research announced the integration of WordStat, the leading text analysis software, with Stata, the popular data analysis and statistical software. This new collaboration couples the cutting-edge numerical analysis of Stata with the unique text analytics functionality of Provalis Research. The combined technologies will enable business analysts and researchers to…

excelmontecarlo.com – a full tutorial on Monte Carlo simulation in Excel without using add-ins. Good introduction to core concepts and some advanced techniques. MonteCarlito is a free Excel add-in with support for both Windows and OS X versions of Excel. It supports some standard statistical functions (mean, median, standard error,…

Monte Carlo Simulation Free Software 2015 BlockTreat is a general frequentist Monte Carlo program for block and treatment tests, tests with matching, k-sample tests, and tests for independence.  BlockTreat is written in Java. excelmontecarlo.com – (Linux only) a full tutorial on Monte Carlo simulation in Excel without using add-ins. Good…

Correlations are easy to find, and many mean nothing. Causation is a much harder fact to establish. A recent report claimed that people who take a multivitamin regularly are 30% less likely to suffer from heart disease. The knee jerk reaction is to go out and buy some multivitamins. But…

GMDH Shell is a simple yet powerful forecasting software, developed by GMDH LLC. Based on neural networks, the software allows you to easily create predictive models, as well as preprocess data with a simple point-and-click interface. GMDH Shell is much faster than other tools based on neural networks thanks to…

Commercial MARCA is a software package designed to facilitate the generation of large Markov chain models, to determine mathematical properties of the chain, to compute its stationary probability, and to compute transient distributions and mean time to absorption from arbitrary starting states. It is written in Fortran. Four possible approaches…