getV                    Getting asymptotic variance of modified wilcox
                        test statistic
get_quant_H0            Calculate the necessary quantities under null
                        hypothesis
mod.symm.test           Wilcoxon and Sign tests for symmetry about an
                        unknown center
model                   Tree_model
n.symm.test             Sample size determination for nonparametric
                        tests of symmetry when the center is unknown
plasma.silicon          Dataset: plasma.silicon
tree_model_sign         Tree_model_sign
