*
1992.10
43 (91.49%) 4 9.51% 26 60.46% 13 4 30.2% 9.31 %
21 6 16 13 45 6 X1=8.16X=40.6 X2 X1 p 0.01 n =43 n =64
51 13 25 18 X1=6.635 X2=18.6 18.6 6.635 P 0.01 n =64 n =43 1995 34 1991 82
1995 1 35 1995 24
1991 228 1992 16
1992 20 1991 228
H K S F E 1 2 3 4
/ / /1. /,,.?.2. / ( )/? ( / /3 (, /
P = P =
x1 + x2 + + xn x = n
xi x Z =
1994 4