forceUseECDF
if true, - if stat is
loglik_mean.brownianbridge, use the Anderson-Darling CDF
#NO - if stat is var.brownianbridge, use the Cramer von
Mises CDF - if stat is extremum.brownianbridge, use the
Kolmogorov-Smirnov CDF #NO - if stat is
ratio_loglik_extremum.brownianbridge, use the chi-square
(3 freedom degrees) CDF - if stat is
ratio_extremum.brownianbridge, use the Bay CDF else, use
tabulated empirical CDF built on white noise process
(length 10000)