Ngày tải lên :
06/02/2015, 20:29
... 0
2
.0, 05+1
2
.0, 12+ 2
2
.0, 17+3
2
.0, 08+4
2
.0, 12+ 5
2
.0, 2+ 6
2
.0, 07+7
2
.0, 02
+8
2
.0, 07 + 9
2
.0, 02 + 10
2
.0, 03 + 11
2
.0, 05 − 4, 33
2
= 8, 3411
σ
X
=
V (X) =
√
8, 3411 = 2, ... 25 (X − 20 0) = 5X + 1000 ; X > 20 0
⇒ E(T ) = 1550.0, 03+1850.0, 09 +20 25.0, 12+ 2075.0, 15 +21 12, 5.0, 11 +21 25.0, 5
= 20 62, 125
ã
S =
30X 4800 ; X 24 0
30X − 4800 − 25 (X − 24 0) = 5X + 120 0 ... =
C
1
8
C
1
2
C
2
10
=
16
45
; P (H
2
) =
C
2
8
C
0
2
C
2
10
=
28
45
H
0
, H
1
, H
2
P (X = 0|H
0
) =
C
0
7
C
2
5
C
2
12
=
10
66
; P (X = 0|H
1
) =
C
0
8
C
2
4
C
2
12
=
6
66
; P (X = 0|H
2
) =
C
0
9
C
2
3
C
2
12
=
3
66
⇒...