  Expected coverage and expected length of 90% upper and lower limit and 68.27%
central intervals are plotted as functions of the true signal for various
values of expected background. Results for several objective priors are shown,
and formulas for calculation of confidence intervals are obtained. For
comparison, expected coverage and length of frequentist intervals constructed
with the unified approach of Feldman and Cousins and a simple classical method
are also shown. It is assumed that the expected background is accurately known
prior to performing an experiment. The plots of expected coverage and length
are provided for values of signal and background typical for particle
experiments with small numbers of events.
