Tu & Zhou (1999) <doi:10.1002/(SICI)10970258(19991030)18:20%3C2749::AIDSIM195%3E3.0.CO;2C> showed that comparing the means of populations whose datagenerating distributions are nonnegative with excess zero observations is a problem of great importance in the analysis of medical cost data. In the same study, Tu & Zhou discuss that it can be difficult to control typeI error rates of generalpurpose statistical tests for comparing the means of these particular data sets. This package allows users to perform a modified bootstrapbased ttest that aims to better control typeI error rates in these situations.
Package details 


Maintainer  
License  GPL3  file LICENSE 
Version  0.1.0 
Package repository  View on GitHub 
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