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2.8.

2.7, . , , [Rubin (1976)]; , , [Tocher (1952); Wilkinson (1968)], [Jarrett (1978)].

, , , , , . .

, X , , X , :

, X, :

X, . 2.5.4 , (2.22) , X

, [Rao (1965), . 29] (2.26),

(2.28) (2.29) , (2.28) (2.29)

2.3. ( 2.2). 4 , :

,

, , :

, .

, , , . (2.29) .

. 2.2, ( ) (0,7755 0,2947) ( ), 1,1679, 2.1.

2.2. (. )

(. )

(. )

(. )

(. )

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