Professional applied statistician with over 20 years experience in bio-medical, pharmaceutical, manufacturing and data mining applications, including providing training courses for scientists and engineers with all levels of statistical expertise. Also specialising in the development of custom data analysis applications using the STATISTICA platform and Visual Basic.
* General stats, anova, linear & nonlinear regression, GLMs, graphical data analysis, non-parametrics and multivariate methods.
* Statistical process control, quality control, design of experiments and six-sigma methods.
* Data mining, exploratory analysis, neural networks and predictive modelling.
* Teaching statistical concepts and methods to non-statistical audiences.
"I agree with Mike L that the choice of model type is less important than the quality of data, but to answer your question, there is a huge number of alternatives available, including discriminant analysis, C&RT, CHAID, Boosted Trees, Support…"
There may be some confusion over terminology here.
First, for the sake of clarity, I should mention that I will use the term, "predictor" to indicate those (continuous or categorical) variables that are being used to make…"
The downloadable trial version includes only STATISTICA Advanced and STATISTICA QC, without the Data Miner or other more advanced components. If you contact your local StatSoft office (http://www.statsoftiberica.com/), they should be able to…"
"It is certainly true that a blind application and reliance on statistical methods without a good understanding of how to interpret the results can be dangerous - but this is not a failing of the methods. In my experience it is much more common for…"
""Statistically significant" simply means that the difference you have seen is unlikely to have occurred purely by chance and is therefore likely to be a "real" effect. If the result is not statistically significant then, however…"
"Student's t test is so widely used for the simple reason that it is the only test that many people know. This does not mean that it is appropriate in all these cases and we should be encouraging the use of more appropriate methods wherever…"
"You may find this text from the STATISTICA Electronic Manual helpful:
Mann-Whitney U Test
The Mann-Whitney U test assumes that the variable under consideration was measured on at least an ordinal (rank order) scale. The interpretation of the test…"