t-test (2 products)

statistiXL 1.4 (Shareware, $75)

statistiXL is a powerful new data analysis package that runs as an add-in to Windows versions of Microsoft Excel. statistiXL has been entirely designed and written by scientists in order to meet the demanding needs of anyone requiring access to a robust, versatile statistical analysis package that is quick to learn and easy to use. With its wealth of features, Excel provides an ideal environment for data input, manipulation and calculation and by leveraging this familiar environment, statistiXL greatly extends this feature set to encompass high powered statistical analysis without the need to learn how to use an entirely new application from scratch. Data stored in existing spreadsheets can instantly be subjected to a wide range of statistical tests (many frequently not seen in other analysis packages). Tests provided by statistiXL include (but are not limited to), Analysis of Variance, Cluster Analysis, Contingency Tables, Correlation (Simple, Partial, Multiple and Canonical), Linear and Circular Descriptive

WINKS, Windows KWIKSTAT 4.651 (Shareware, $99)

WINKS (Windows KWIKSTAT) makes statistical data analysis understandable and easy to perform for the researcher, student, or scientist. Award-winning statistics program with thousands of users in over 65 countries. Basic analyses available in WINKS include Descriptive statistics and graphs, calculation of p-values, T-tests and Analysis of Variance (ANOVA)up to 20 groups, including paired and repeated measures, Non-parametric analyses including Mann-Whitney, and Kruskal-Wallis, and Friedman's test, Frequency and Crosstabulation including Goodness of fit, McNemar's test, Chi-square, Fisher exact, Relative Risk, and Odds Ratio, Regression and Correlation, plus Simulations and Demonstrations of basic statistical concepts. Uses industry standard dBASE files, and can import files from other programs such as Excel. Help includes over 200K of examples.