  We present a large sample which contains 45 Seyfert 1 galaxies (Sy1s), 46
hidden broad-line region (HBLR) Seyfert 2 galaxies (Sy2s), 57 non-HBLR Sy2s,
and 22 starburst galaxies to distinguish their properties and to seek the
possible evolution of active galactic nuclei (AGNs) and starburst galaxies. We
show that (1) using a plot of [O III] {\l}5007/H/alpha versus [N II]
{\l}6584/H/alpha of standard optical spectral diagnostic diagrams, we find that
a equation can separate well non-HBLR Sy2s and HBLR Sy2s; (2) the emission-line
ratios and both the combination of the ratios and polycyclic aromatic
hydrocarbon (PAH) strength are utilized effectively to separate starburst
galaxies and Seyfert galaxies; (3) we compare a number of quantities from the
data and confirm well the separations with statistics; (4) on the basis of
statistics, we suggest that HBLR Sy2s may be the counterparts of Sy1s at
edge-on orientation. In addition, we discuss the possibility of starburst
galaxies evolving to non-HBLR Sy2s and HBLR Sy2s and then evolving to Sy1s
based on the statistical analysis.
