June 2015
Beginner
458 pages
13h 37m
English
Content preview from Using JMP Student Edition, Third Edition
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12 Survival Analysis Platform Univariate Survival Analysis 257
12 Survival Analysis Platform
Figure 12.8 Tests Between Groups
Tes t
names two statistical tests of the hypothesis that the survival functions are the same across
groups.
Chi-Square gives the Chi-square approximations for the statistical tests.
The
Log-Rank test places more weight on larger survival times and is more useful when the ratio of
hazard functions in the groups being compared is approximately constant. The hazard function is
the instantaneous failure rate at a given time. It is also called the mortality rate or force of mortality.
The
Wilcoxon test places more weight on early ...
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