Performs (simultaneous) inferences for ratios of linear combinations of coefficients in the general linear model. Multiple comparisons and simultaneous confidence interval estimations can be performed for ratios of treatment means in the normal oneway layout with homogeneous and heterogeneous treatment variances, according to Dilba et al. (2007) <https://cran.rproject.org/doc/Rnews/Rnews_20071.pdf> and Hasler and Hothorn (2008) <doi:10.1002/bimj.200710466>. Confidence interval estimations for ratios of linear combinations of linear model parameters 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 confidence interval are provided assuming homogeneous or heterogeneous group variances.
Package details 


Author  Gemechis Djira [aut], Mario Hasler [aut], Daniel Gerhard [aut], Frank Schaarschmidt [aut, cre] 
Maintainer  Frank Schaarschmidt <schaarschmidt@biostat.unihannover.de> 
License  GPL2 
Version  1.4.0 
Package repository  View on CRAN 
Installation 
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