Changes and Improvements

Changes and improvements during the last two years (texts which are not yet translated or which are under construction are marked by four stars ****):

Date	Changes
2012-10-xx	measures of classifier quality added the page on the ANOVA has been enhanced by a supplementary table on the increase of the level of significance for multiple comparisons (****) weighted regression (****) new section on memory based learning (****) section on maximum likelihood added description of ROC curve added Windowing Function and FFT revised and improved biography of Ronald A. Fisher added section on sensor sensitivity improved biography of Karl Pearson added Analysis of residuals revised and extended
2012-10-08	the description of the AD conversion extended the section on Goodman and Kruskal's Gamma revised cross links extended
2012-09-07	description of censored data extended Pareto distribution the section on runs tests extended the font size of the navigation bar has been adjusted to improve readability
2012-07-23	new section on indicator variables PCA - Banana revised new section on the confidence interval overview on measures of association added description of tied observations added description of censored data description of the runs test mistake in factor analysis fixed (matrix multiplication was wrong)
2012-03-14	section on moving averages revised Wilcoxon sign rank test for paired differenced revised predictive ability revised section on dichotomous features extended by a few examples
2012-01-04	section on principal component analysis (PCA) revised description of the ANOVA revised description of Kendall's Tau improved
2011-05-15	chapter on the transposed matrix revised Venn diagrams extended
2011-03-19	section on dichotomous varaables reorganized HTML bug in Population and Sample fixed
2011-02-19	overview on parametric and non-parametric tests added t test for matched pairs revised the definition of the zero matrix is now on an extra page the layout of the footnotes has been harmonized a section on ridge regression has been added
2011-02-05	list of datasets revised Fourier series revised a page defining frequencies added description of the contingency table added section on the distribution of the correlation coefficient revised the section on the contingency coefficient has been revised quadratic mean added
2010-11-30	mode of a distribution improved observations and variables revised
2010-11-22	a description of the Shapiro-Wilk-Test added the page about the level of significance extended table on tests for normality added description of probability plots und QQ plots added
2010-11-03	revised description of scales
2010-11-01	literature references revised new pages about the discrete uniform distribution and the Cauchy distribution a new simulation concerning the Cauchy distribution
2010-10-24	new dataset "Bananas" added
2010-10-12	figures showing erroneous transparency are now corrected
2010-09-04	automatic calls of DataLab revised inclusion of many additional links and "see also" hints
2010-09-02	the Poisson distribution has been added to the simulation of discrete distributions the simulation Measures of Location now additionally shows the trimmed mean