calculate_rse           Calculate the Relative Standard Error of a
                        numeric vector
conduct_multiple_surveys
                        Conduct multiple simulations of a survey
estimate_ehat_variance
                        Calculate within-day variance of estimated
                        effort (Ehat)
get_total_values        Conduct a creel survey of a population of
                        anglers at an access site.
make_anglers            Create a population of anglers.
simulate_bus_route      Simulate a bus route survey
