Statistics software for data analysis and multivariate statistical analysis. Probability analysis. Compute descriptive statistics of selected data. Frequency analysis. Compare means and variances. Variance analysis. Z test. Correlation tests. Jarque Bera test. Non-parametric tests, including one sample Chi-square test, two samples Chi-square test, one sample K-S test, two samples K-S test, sign test, Wilcoxon signed rank test, Mann Whitney U test. Regression analysis, including univariate linear regression, multivariate linear regression, linear curve fitting, nonlinear curve fitting, trend surface analysis, stepwise regression etc. Correlation analysis, including bivariate correlation analysis, partial correlation analysis and canonical correlation analysis. Cluster analysis, including stepwise cluster analysis, hierarchial cluster analysis and dynamical cluster analysis. Stepwise discriminant analysis. Principal component analysis. Factor analysis. Correspondence analysis.