() - :
(5.1) 
, , . , lim x 1 = 85 116 lim x 2 = 60 135.
(r) :
(5.2)
(r1) 116 85 = 31 (r2) 135 60 = 75.
10- 90- ( D) :
(5.3)
, D 10% 80%. , , (, ) .
, D. 1- 3- :
(5.4)
, 25% ( ) 50%, .
(Q 1/2) 1- 3- :
(5.5)
1- 2- 2- 3- , . 25% .
(MD) , . . . (, , x i 
), :
(5.6)
|
|
|
(s2) ( x i 
):
(5.7)
n 1 , . , , , , ( ).
5.7 ( ). () , .
:
. , :
, :
(5.8)
:
1. , xi c: x j = x i + c Þ sj2 = si2.
2. c xi c 2 : xj = xi Þ sj2 = 2 × si2.
