, . , .
10.3.1 , , . .
10.3.1.1 N ( N =8) , , , . .7.1 . , , .
10.3.1.2 Q ( Q =20). ai, , ( ).
10.3.1.3 , , Q , .. :
. | (61) |
, , Q , .. :
. | (62) |
( ) , , :
. | (63) |
4. .
4
(61) | , (61) |
(62) | , (62) |
, (63), (N -2) () | , (63) , |
10.3.2 X P (X) , 5.
5
ai, i - | i - |
(64) | |
(65) | |
(66) | |
(67) | |
(68) |
|
|
.
|
12
10.3.3 MS Excel ( m s2) N(m, s2) ( 12). MS Excel .
, .
10.3.4 X P (X) , 6.
6
P (X) | X |
P (X) = 0,5 | (69) |
P (X) = 0,995 | (70) |
P (X) = 0,005 | (71) |
2,58 F(x), F(2,58)=0,995, F(-2,58)=0,005 |
10.3.5 .
10.3.5.1 B :
, | (72) |
LSL .
10.3.5.2 EV :
. | (73) |
. , 8%. , , 1,08.
10.3.5.3 B EV ( ).
10.3.6 .
10.3.6.1 :
. | (74) |
10.3.6.2 t - ( ), , a=0,025 t, k ,
M -1.
10.3.6.3 t < t, .
10.3.6.4 t ³ t, , .
10.3.6.5 .