Table 5: Fraction of flat- and inverted-spectrum components in various Seyfert samples. The column " $N_{\alpha >-0.3}$ '' gives the number of components with spectral indices $\alpha >-0.3$ (i.e., components with flat or inverted spectra). The column " $N_{\rm total}$ '' gives the total number of components in each sample. The column % gives $(N_{\alpha >-0.3}/N_{\rm total})\times 100$ . The column P gives the level of significance from a comparison of the fraction of flat- and inverted-spectrum components in the VLBI sample of this paper (limits treated as detections), to that of each comparison sample at arcsec resolution, using the difference-of-two-proportions test with Yates correction for continuity (e.g., Glanz 1992).
Sample $N_{\alpha >-0.3}$ $N_{\rm total}$ % P

This paper our obs + lit search 17 38 45

Unger et al. (1987) X-ray Seyferts 1 20 5 0.3%

Rush et al. (1996) CfA Seyferts 3 46 6.5 <0.1%

Rush et al. (1996) 12 $\mu$ m Seyferts 4 40 10 <0.1%

Morganti et al. (1999) Distance limited 13 60 22 1.8%

Ho & Ulvestad (2001) Palomar Seyferts 21 45 47 50%

Ulvestad & Wilson (1984) Distance limited 3 40 7.5 <0.1%

**Table 5:** Fraction of flat- and inverted-spectrum components in various Seyfert samples. The column " $N_{\alpha >-0.3}$ '' gives the number of components with spectral indices $\alpha >-0.3$ (i.e., components with flat or inverted spectra). The column " $N_{\rm total}$ '' gives the total number of components in each sample. The column % gives $(N_{\alpha >-0.3}/N_{\rm total})\times 100$ . The column P gives the level of significance from a comparison of the fraction of flat- and inverted-spectrum components in the VLBI sample of this paper (limits treated as detections), to that of each comparison sample at arcsec resolution, using the difference-of-two-proportions test with Yates correction for continuity (e.g., Glanz 1992).
Sample		$N_{\alpha >-0.3}$	$N_{\rm total}$	%	P
This paper	our obs + lit search	17	38	45
Unger et al. (1987)	X-ray Seyferts	1	20	5	0.3%
Rush et al. (1996)	CfA Seyferts	3	46	6.5	<0.1%
Rush et al. (1996)	12 $\mu$ m Seyferts	4	40	10	<0.1%
Morganti et al. (1999)	Distance limited	13	60	22	1.8%
Ho & Ulvestad (2001)	Palomar Seyferts	21	45	47	50%
Ulvestad & Wilson (1984)	Distance limited	3	40	7.5	<0.1%

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