Table 3: Averaged diagnostic flux ratios.
Sample Number^a C IV / He II C III] / C IV

HzRG 49 $\rm 1.42^{+0.10}_{-0.09}$ $\rm0.67^{+0.06}_{-0.06}$

QSO2 6 $\rm 2.07^{+0.36}_{-0.31}$ $\rm0.52^{+0.08}_{-0.07}$

Sy2 8 $\rm 2.20^{+0.16}_{-0.15}$ $\rm0.49^{+0.06}_{-0.05}$

^a
Number of objects for which both of the flux ratios of C IV $\lambda$ 1549/He II $\lambda$ 1640 and C III] $\lambda$ 1909/C IV $\lambda$ 1549 were measured. Objects with a lower-limit or upper-limit data are not included.

**Table 3:** Averaged diagnostic flux ratios.
Sample	Number^a	C IV / He II	C III] / C IV
HzRG	49	$\rm 1.42^{+0.10}_{-0.09}$	$\rm0.67^{+0.06}_{-0.06}$
QSO2	6	$\rm 2.07^{+0.36}_{-0.31}$	$\rm0.52^{+0.08}_{-0.07}$
Sy2	8	$\rm 2.20^{+0.16}_{-0.15}$	$\rm0.49^{+0.06}_{-0.05}$

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