The software Assistat–Statistical Assistance was developed with the objective of being
accessible for students and researchers, regarding its cost as well as the easiness of use, not being necessary
specific knowledge of computer programming. The new version of the software Assistat-Statistical
Assistance (version 7.3) has an easy installation program and runs in Windows 98, Windows NT, Windows
XP and other operating systems from the Windows family. It makes variance analysis (ANOVA) for data
from experiments with the following design: entirely randomized, randomized blocks, Latin square, splitplots,
split-split-plots and factorial, applying jointly the test “F” to verify effect of significance and the test
of Tukey or the test “t” to compare means. In the cases of experiments in split-plots, split-split-plots and
factorial, it applies the crossed Tukey test in the interaction means, when there is significant interaction
effect. It also makes regression in the variance analysis, in the case of quantitative treatments. It still
performs adjustment test or adherence of series by the method of Kolmogorov-Smirnov, test of the
correlation coefficient, test of Mann-Whitney, test of Kruskal-Wallis and the following normality tests:
Kolmogorov-Smirnov, Cramer-von Mises, Anderson-Darling, Kuiper, Watson, Lilliefors and Shapiro-Wilk.
Together with the results of the normality tests it presents the main statistical measures as mean, standard
deviation, curtose, asymmetry and other. The Assistat is rapidly running and friendly used software that
caries out most of the necessities on data variance analysis of the agricultural engineering researchers.