We have developed FORTRAN computer code that calculates the order statistic that corresponds to a nonparametric, one-sided, lower confidence bound on a quantile. A web program to perform this calculation can be run at http://www1.fpl.fs.fed.us/nonpar_ci_quant.html.
A standalone FORTRAN version of this computer code
can be found here.
This program also depends upon the DCDFLIB cumbet subroutine.
DCDFLIB is a
public domain library of "routines for cumulative distribution
functions, their inverses, and their parameters." It was produced
by Barry Brown, James Lovato, and
Kathy Russell of the Department of Biomathematics,
M.D. Anderson Cancer Center, The University of Texas.
DCDFLIB can be found