In a research work we oftenly have to interpret the data collected during the study. Several computer software are available for the use of analyzing those data including Statistical Packages for the Social Sciences (SPSS), Biomedical Programs (BMDP), Epi-info, and Minitab. However, problem usually arise because of the misinterpretation or misreading of the results provided bu those sofware. Th…
Many clinical trials have been designed to test the distribution of survival times between treatment and control groups. The development of statistical methods addressed to this issue has been proposed more than two decades ago. For example, the most populair of survival analysis is an extension of Mantel and Haenzel's statistic which is originally proposed in 1959. More complicated multi-varia…