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statistiXL is a new data analysis package that runs as an add-in to Windows Excel Spreadsheet program. statistiXL has been entirely configured by scientists in order to meet the needs of anyone requiring access to a reliable, versatile statistical analysis package that is quick to learn and easy to use.Following statistical operations are available in statistXL : Analysis of Variance (ANOVA) Cluster Analysis Contingency Tables Simple, Partial, Multiple and Canonical Correlation Linear and Circular Descriptive Statistics Classification and Grouping Discriminant Analysis Factor Analysis Goodness of Fit Tests such as Binomial, Circular, Normal and Poisson Simple and Multiple Linear Regression Nonparametric Tests such as Friedman, Kruskal-Wallis and Mann-Whitney Principal Component Analysis (PCA) Univariate and Multivariate t-Tests The add in is little nagging if the trial version is maintained. Free trial available. Price : $75 Link : http://www.statistixl.com/default.aspx