Table 3: Mean reddening in the observer's frame, $\langle E \rangle$, and mean extinction in the rest frame, $\langle A_{\rm V} \rangle$, for different colors and DLA/QSO samples.
Color     (r-z)       (g-z)  
Redshift interval     $2.25 \leq z_{\rm e} \leq 3.5$       $2.25 \leq z_{\rm e} \leq 3.4$  
Absorption n ${\langle E(r-z) \rangle}$ $\langle A_{\rm V} \rangle$ $\langle A_{\rm V}/N(H {\sc i}) \rangle$ n ${\langle E(g-z) \rangle}$ $\langle A_{\rm V} \rangle$ $\langle A_{\rm V}/N(H {\sc i}) \rangle$
sample   [10-3 mag] [10-3 mag] [10-23 mag cm2]   [10-3 mag] [10-3 mag] [10-23 mag cm2]
1a 248 27 $\pm$ 8.8 19 $\pm$ 5.9 4.1 232 54 $\pm$ 12 17 $\pm$ 3.8 3.2
2b 247 24 $\pm$ 8.3 17 $\pm$ 5.6 3.5 231 51 $\pm$ 12 16 $\pm$ 3.7 2.8
3c 246 22 $\pm$ 8.0 16 $\pm$ 5.4 3.0 229 48 $\pm$ 11 15 $\pm$ 3.5 2.4
Bootstrapd 248 27 $\pm$ 9.2     232 54 $\pm$ 14    
a Complete absorption sample of Table 1.
b Cases with $\Delta_i > \langle \Delta \rangle + 5 \times \sigma$ are excluded from the complete sample ( $\sigma = \sigma_m \times \sqrt{n}$).
c Cases with $\Delta_i > \langle \Delta \rangle + 3 \times \sigma$ are excluded from the complete sample.
d Mean and standard deviation of the mean color excess of 10 000 bootstrap samples obtained
from the absorption sample 1.

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