7

1948 1949 5 6

1947 5 6

1950 7

6 4

1954 1955

1954

1959 4

1919 8 31 9 1 14 1920 12 195758

55 56

O 1971 4 1983 5

O

CTABEHHE 1956 1957 29 32

1960 1957 8

1960

12 1959 58 3 21 7

1960 4 9 3

1957 11

50

40 40 80 20 20 40

1959 60

1950 1 1951 60 1961 1966 3 1972 7 1975 7

1967 1 1968 7 1969 10 1970 6 7 1973 8 8341 1968 7

1977 2 7 50 1952 1959 1960

1984 3 2 3

1

1 1 2

1957 161

1982 85 2 19863 2

6 11 90% 60 70% 50% 20 30% 7 300 500

1988 11

= X

xi x zi = S x x N 1 x = xi N i= 1

N ( Xi X) 2 i= 1 Sx = N xi xi 90 74. 5 zi = = = 1085.. 14. 2 S x

9 1979 8 1983 5 1989 5 1 31 256

1949

1950 1961 1980 30

Λ Λ Λ Λ Λ Λ Λ Λ

1987 4 1987 4 1988 3 80