1, . , , , .
, , ,
, :
f (t) = (1 / s Ö 2p) exp{- [(t m)2 / 2 s2]}
f (t) = f0 (up) / s
:
P(t) = 1 - F0 (up)
P(t) = 0,5 - (up)
Q(t) = F0 (up)
Q(t) =0,5 + (up)
3 , .
3 (), () () ; .
, , , . , s1 > s2, 1 , 2 ( 4).
4 s1 > s2
, f (t), , t>>0, .. , , , t1 ( 3, 4) , .