n=5: importance sampler (2e6 samples) vs exact BEST values: max|z| = 3.09 over 13 values of i; chi2/dof = 1.28
   z by i: 2:-0.22 3:+0.78 4:-1.20 5:-0.37 6:-0.13 7:-0.45 8:-1.32 9:+3.09 10:-0.54 11:+0.90 12:+1.26 13:-0.07 14:-0.41
n=6: importance sampler (2e6 samples) vs exact BEST values: max|z| = 1.84 over 21 values of i; chi2/dof = 0.66
   z by i: 2:-0.88 3:-0.39 4:+0.14 5:-0.54 6:-0.03 7:+1.06 8:+0.62 9:+0.73 10:-0.35 11:-1.01 12:+0.38 13:+0.08 14:+0.57 15:+1.54 16:+1.84 17:-1.02 18:+0.76 19:-1.24 20:-0.23 21:-0.15 22:+0.09
[rerun, 2e7 samples, new seed] n=5: max|z| = 1.83; chi2/dof = 0.90
   z by i: 2:+0.67 3:-1.51 4:-0.93 5:+0.82 6:+0.21 7:+1.83 8:+1.15 9:-0.87 10:-0.41 11:+0.67 12:-0.43 13:-0.18 14:-1.08
[rerun, 2e7 samples, new seed] n=6: max|z| = 2.74; chi2/dof = 0.96
   z by i: 2:+0.51 3:+0.24 4:-0.92 5:-0.27 6:+0.27 7:-1.47 8:+0.55 9:+0.65 10:-0.42 11:+1.14 12:+1.43 13:+0.60 14:-0.42 15:-0.44 16:+1.01 17:-1.17 18:+0.95 19:+0.15 20:-0.48 21:-0.75 22:-2.74
