BIOMstat, Statistical Analysis For Biologists, Version 3.3

A comprehensive yet easy to use statistical package for MS Windows. It performs many of the statistical analyses commonly used in the biological and biomedical sciences. The program was developed to accompany the third edition of the text Biometry by R. R. Sokal and F. J. Rohlf (1995).
Version 3.3 provides easy to use (just click a speed button on the toolbar) yet powerful graphics designed to illustrate the results or reveal conformity to critical assumptions of most of the analyses in BIOMstat. Sample screen shots are available. There is also a Frequently Asked Questions page.
BIOMstat is a complete rewrite of the previous BIOM-pc suite of programs. A list of changes in the new version 3.3 is available here. It is now a single program with many new analyses added. These include logistic regression, isotonic regression, Mantel tests, Kendall and Spearman rank correlations, and others. Single-classification and factorial anova are now much more convenient. Probabilities are provided with all tests. Randomization tests and bootstrap estimates of parameters are provided for many of the modules. Methods are selected using a menu of buttons organized within folders (see the screen shots for examples). Standard data transformations are available.
Methods included in BIOMstat:

Analysis of frequency data: Fisher’s exact test, goodness of fit & expected frequencies (includes replicated goodness of fit tests), log-linear models of 3-way tables, logistic regression, and tests of independence for 2-way tables (with Gabriel's simultaneous test procedure to find a maximal non-significant sets of rows and columns).

Analysis of variance related methods: 1-way analysis of covariance with 1 covariate, up to 9-way factorial anova (=n), 2-way anova with unequal sample sizes, test homogeneity of variances, single classification anova, nested anova, Tukey’s test for non-additivity, Kruskal-Wallis test, Mann-Whitney U-test, and multiple comparisons among means (T, T', GT2, SS-STP, Welsch, and Games & Howell).

Correlation: product-moment correlation and non-parametric tests of association. Includes major (principal) axis and reduced major axis Model II regression methods. A random permutation test can be used to test both r and the major axis regression slope.

Regression: analysis of covariance, linear regression, multiple regression (with Kruskal's method for estimating the "importance" of each variable), polynomial regression, logistic regression (allows for multiple independent variables), isotonic regression, and Kruskal's robust line-fit method.

Descriptive statistics: computation of means, medians, variances, coefficient of variation, g1 and g2 for both raw data and from frequency distributions. Standard errors, confidence limits, and delta-corrected Komolgorov-Smirnov test for fit to normal distribution.

Nonparametric statistics: Kruskal-Wallis test, Mann-Whitney U-test, Mantel test, Kendal's rank correlation tau, Spearman rank correlation, and Kruskal's (also known as Sen's) robust line-fit method, Friedman’s method for randomized blocks, Wilcoxon’s signed-ranks test for two groups (paired comparisons), and the Scheirer-Ray-Hare two-way anova of ranks.

A probability calculator for the t, chi square, F, and normal distributions.

A sample size calculator to estimate required sample sizes in an anova.

For more information about the methods included in this software, see the text Biometry by R. R. Sokal and F. J. Rohlf (1995).

Requirements: PC compatible with MS Win95/98/NT/Vista, about 3 MB of disk space
Cost: $300 ($230 for educational and governmental institutions), upgrade from previous version (3.2): $175 ($130 for education and government). A 10-user site license is $850 ($650 education and government). Plus shipping costs.
Licensed users can download a copy of the latest update to BIOMstat when an update becomes available.

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