  We report quantitative neutron scattering measurements of the evolution with
doping of the N\'eel temperature, the antiferromagnetic correlations, and the
ordered moment of as-grown, nonsuperconducting Nd_{2-x}Ce_xCuO_{4\pm\delta} ($0
\le x \le 0.18$). The instantaneous correlation length can be effectively
described by our quantum Monte Carlo calculations for the randomly site-diluted
nearest-neighbor spin-1/2 square-lattice Heisenberg antiferromagnet. However,
quantum fluctuations have a stronger effect on the ordered moment, which
decreases more rapidly than for the quenched-disorder model.
