X=X+ ∆c
X- ,
X-
m
∆c= 1/n ∑∆ci
i=1
∆ci-
m- .
t=|A1-A2|/sqrt(12+22) n >100
t≥1
n>30
t=|A1-A2|/sqrt((n1-1)S12-(n2-1)S22)
-
S21=∑(At1-A1)2/(n1-1)
t
n>30
t=|A1-A2|/sqrt(S12/n1+ S22/n2) <>t .
- r
r=q2/S2<>r .
n
S=sqrt (1/(n-1)∑(Xi-x)2)
i=1
n
q=sqrt (∑(Xi+1-Xi)2)/2(n-1)
i=1
r .
.
t=200 C ∆l=α∆tL
- ( )
( ), +, -
( ) 2-
,
(.)=(.)
β ( )
,
∆ (.)=(.)-.(.)
:
∆(.)= (.)-.(.) ∆ (.)+ ∆(.)=0