EASISTAT is a public domain statistics program which runs from the MS-DOS command prompt in Windows and which is provided as source code to allow compilation on other platforms. It provides the following functions and tests:
Mean, mode, median, standard deviation, variance, standard error of mean, skewness, kurtosis, chi-squared test, Fisher's exact test, Wilcoxon's rank sum and signed rank sum, Kendall's rank correlation, paired and unpaired t tests, one way analysis of variance, Kruskal-Wallis analysis of variance by ranks, linear regression with Pearson's correlation coefficient, multiple linear regression and principal component analysis.
Calculator and table look-up functions are also available. Complex arithmetic and logical expressions can be used for case selection or to transform variables. Data are kept in simple ASCII files to allow easy conversion to and from other formats. The program is controlled by commands and an important feature is that it can be run either interactively from the keyboard or in batch mode from command files.