r-cran-lmertest 2.0-36-1 (arm64 binary) in ubuntu bionic

 Different kinds of tests for linear mixed effects models as implemented
 in 'lme4' package are provided. The tests comprise types I - III F tests
 for fixed effects, LR tests for random effects.
 The package also provides the calculation of population means for fixed factors
 with confidence intervals and corresponding plots. Finally the backward
 elimination of non-significant effects is implemented.