With this package, it is possible to perform (simultaneous) inferences for ratios of linear combinations of coefficients in the general linear model. In particular, tests and confidence interval estimations for ratios of treatment means in the normal oneway layout and confidence interval estimations like in (multiple) slope ratio and parallel line assays can be carried out. Moreover, it is possible to calculate the sample sizes required in comparisons with a control based on relative margins. For the simple twosample problem, functions for a ttest for ratioformatted hypotheses and the corresponding Fiellertype confidence interval are provided assuming homogeneous or heterogeneous group variances.
Package details 


Author  Gemechis Dilba Djira, Mario Hasler, Daniel Gerhard, Frank Schaarschmidt 
Date of publication  20121102 13:35:30 
Maintainer  Frank Schaarschmidt <schaarschmidt@biostat.unihannover.de> 
License  GPL 
Version  1.3.17 
Package repository  View on CRAN 
Installation 
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