. 100-150 . , , . . , , , , , , . . l =const (4.5), (4.6), (4.15) :
P (t) = 1 - F (t)= -lt
q (t) = 1 - -l t (5.1)
f (t) = l× -lt.
, t (5.1). t , . . , , , .. , t . .
, , D t=t 2 -t 1
P (Dt) = -lt2 - -lt1 (5.2)
, , . , , 10 , 990 1000 , 540-550 .. , , 1000- =0,0001 -1. 10 1000 :
(10) = -0,0001×10 = -0,001 = 0,999.
10 . 0 990 :
P (990) = e- 0,0001×990 = -0,099=0,90.
. 0. :
(5.3)
. (5.4)
. - n , 0. 0 0( 0)=1. S S 0( 5.2).
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5.2
:
S 0 = 0( 0 )× 0; . (5.5)
S=S 0, 0( 0 ) =1,
. (5.6)
(5.1), :
(5.7)
(5.7) , - , (.. t= T 0):
( 0) = -1 = 0,368.
, . . , . , . . l =const . 5.3 , .
5.3 (), () ()
, ( ) ( ). , r t :
. (5.8)
(5.8) . .