التباين في الاحتمالات
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Transcript of التباين في الاحتمالات
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.I
.II
.III
.VI
.V
( + ) .IV
( + ) .IIV
( ) .IIIV
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.x x...... x1 2 nn
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= = L F P92 ,0 55,0 35,0 ) (
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) (3 6: 4 8
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) (38
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06,0 = =)M(P09051 81,0=3,0 6,0 =)N M(P .
PRNM5,02,03,009F55,051,03,006253554051
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= B P3,0 ) ( = A P8,0 ) ( : BA . = B A P68,0 ) ( BA
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-
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1 1 1 ( .1 4 2 2
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= +
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= p pA 1=)A(
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.21110198765432: X (
.)X(E X (
-
ix 2 3 4 5 6 7
( )ip X x =136
236
336
436
536
636
ix 8 9 10 11 12
( )ip X x =536
436
336
236
136
1 2 3 4 5 6( ) 2 3 4 5 6 7
36 36 36 36 36 365 4 3 2 1
8 9 10 11 1236 36 36 36 36
E X = + + + + + +
+ + + +
( )1( ) 2 6 12 20 30 42 40 36 30 22 1236
E X = + + + + + + + + + +
:( ) 7E X =
( p(X>6)p(X=12)
1( 12)36
p X = =
( 6)p X >( 6) ( 7) ( 8) ( 9)
( 10) ( 11) ( 12)p X p X p X p X
p X p X p X > = = + = + = +
= + = + =
6 5 4 3 2 1( 6) 7 8 9 10 11 1236 36 36 36 36 36
p X > = + + + + +
:182( 6)252
p X > =
-
123456
1123456224680233692584482604
.2
= pi1 pi0 m
n
i i1 =i
= m x P
2) ( V1
n
i ii
m x P V =
- =
= + + - = = X p2 ,0 )3,0 2 ,0 3,0( 1 )0 (:
= V22 = m 1
= + + + - = = X p50,0 )1,0 51,0 2 ,0 5,0( 1 )001 (:
= V017 = m 03
= + + + + - = = X p51,0 )50 ,0 1,0 1,0 4 ,0 2,0( 1 )6 (:
= V54,11 = m 5,0
.3
:
: . :
-
= W 9 8 6 5 4 3 2 1 0} { 42
012345689xi
142
18
16
121
16
121
542
142
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p
= V93,6 = m 71,4
.4
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: 01
1 ( 2
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3 ( 01 3
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: 09 9 01
4 5 ( 09 2
9 .
6 7 2 3 ( 09
+
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6 7 2 3
. + 6 7 2 3
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. 4 9
.
4 ) ( : 9
. = A p
5: A
. 8
5 ) ( A8
. = B p
. = B p A p B A pA) ( ) ( ) (
5 5 4 ) ( 81 8 9
. = = B A p
.6
" : " A:
" : " F
( )
:
-
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4 ) ( F p) ( 01
= F p
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A F p) (
42 6 4 ) ( ) ( ) ( F001 01 01
= = = F p A p A F p
. (
A F p) ( 21 4 3 ) ( ) ( ) (
F001 01 01= = = F p A p A F p
F
F
A
A
A
A
6
01
4
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6
013
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7
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4
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%06 %04
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+ = F A p F A p A p) ( ) ( ) (63 21 42 ) ( :
001 001 001= + = A p
.7
. 6 .1
:
1 2 ) (3 6
12 ) ( ) ( = = U p3
. = - = U p U p
.A pU) ( .2 .1 U
4 7
(. )
4 ) ( U7
. = A p
13 ) ( ) ( U U7
. = - = A p A p
.2 U .3
:
2 ) (U7
15 ) ( ) ( = A pU U7
. = - = A p A p
-
: A p) ( .4 + = A p U p A p U p A pU U) ( ) ( ) ( ) ( ) (
2 2 4 1 ) (7 3 7 3
+ = A p
8 ) ( 12
. = A p
.8
= S6) ( "6 " .1 .2 4) ( 33) ( 4 2) ( : = L3) ( "3 " .4 3) ( 33) ( 2 3) ( 13) ( : = = = L S33 3 6{ }) ( ) ( ) ( :
: { }) (
) (
1611 33
4 3461
p
L p = =
=
U
U
A
A
A
A
1
3
2
3
4
7
3
72
7
5
7
-
= = j L S2 7) ( ) ( : .2 .6 2
.
.9
: M
". "
BM
M
.B
:
= B PM9,0 ) ( = B PM8,0 ) ( = M P6,0 ) ( : = - = M P4 ,0 6,0 1 ) ( : . = - = B PM1,0 9,0 1 ) ( = - = B PM2 ,0 8,0 1 ) ( E MM
+ = M B P M B P B P) ( ) ( ) ( : + = M P B P M P B P B PM M) ( ) ( ) ( ) ( ) ( = + = B P25,0 4 ,0 1,0 6,0 8,0 ) ( :
6,0
4 ,0
M
M
B
B
B
B
8,0
9,0
-
10.
( ) 0,8P A = ( ) 0,3P B = ( ) 0,86P A B = . ( )P A B ( ) ( )P A P B .
( ) ( ) 0,8 0,3 0, 24P A P B = = ( ) ( ) ( ) ( )
0,8 0,3 0,86 0, 24
P A B P A P B P A B = + -
= + - =
( ) ( ) ( )P A B P A P B = AB .11.
( )P A B ( )BP A ( )AP B
( ) 0,3P A = ( ) 0,7P B = ( ) 0,8P A B =
( ) ( ) ( ) ( )0,3 0,7 0,8 0, 2
P A B P A P B P A B = + -
= + - =
( )BP A
( ) ( ) ( )0, 2 20,7 7B
P A BP A
P B
= = =
( )AP B
( ) ( ) ( )0, 2 20,3 3A
P A BP B
P A
= = =
-
: .IIV
.
.
(1
4,0=)B(p7,0=)A(P: BA
. = B A p2,0 ) (
: B A p) ( .1
6,0( 1,1( 9,0(
: B A p) ( .2
1,0( 2,0( 8,0(
: B A p) ( .3
3,0( 1,0( 8,0(
: B A p) ( .4
1,0( 9,0( 8,0(
(2
.
: B pA) (
21,0( 4,0( 6,0(
B
A
A
B
B
3,0
7,0
4,0
6,0
4,0
6,0B
-
.
. (1
. BA
= B p A P B A p) ( ) ( ) ((
= A p B pA) ( ) ((
= A p A pB) ( ) ((
= B p A P B A p) ( ) ( ) ((
- = A p B P) ( 1 ) ((
(2
.81,0B
(3
. BA
(4
: BA
= B p A p B A p) ( ) ( ) (
B
A
A
B
B
1,0
9,0
9,0
1,0
9,0
1,0B
-
.
(1
- + = B A p B p A p B A p) ( ) ( ) ( ) (9,0( .1
- = B A p B p B A p) ( ) ( ) (2,0( .2
- = = B A p B A p B A p) ( 1 ) () ( 1,0( .3
- = = B A p B A p B A p) ( 1 ) () ( 8,0( .4
(2
4,0(
.
.....(1
+ = A B p A B p B p) ( ) ( ) ((2
+ = A p B p A p B p) ( ) ( ) ( ) (
+ = 9,0 9,0 1,0 9,0
= + = 9,0 18,0 90,0
(3
(4
-
: .IIIV
( 6)
598
:
0558591
582022
082
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. " A " :T
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: .4
T pE) ((E pS) ((
-
. .1
.
5,1
60,0 ) (05( .2598
; = S E p
21,0 ) (06 05( 598
T E p +
; =
5,0
5,0
) (58( .3598
= T E p
082 591) ( ) (
598 598 = T p E p
T p E p T E p) ( ) ( ) (
. TE
. (
E T E S *
E T E S*
5,0
5,0
5,0
5,0
5,0
T pE) (E pS) (: .4
) (582( S533
) (58( = E pE591
5,0+5,0= T p
-
. .1
050658591
582022591007
533082082598
: .2
" A " :E
" " :S
. " A " :T
- 012
S E p) ( (
" : " S E
60,0 ) (05598
; = S E p
T E p) ( (
: " T E
"
21,0 ) (06 05598
T E p +
; =
-
T p E p) ( ) ( T E p) ( ( .358
) (598
) ( ) (082 591 = T E p598 598
= T p E p
T p E p T E p) ( ) ( ) (
. TE
. (
E T E S *
E T E S*
T pE) (E pS) (: .4
) (582( S533
= E p
) (58(E591
= T p
.1
.
. .2
( .3
.
. = B A: BA(
) () (: .4B) (
B A pA p
B p
=