. .
1. . xi , : , n , m i i.
2. . i:
, i - .
, .
, , . .
:
, .
: : 1, 2, 3, 4, 5, 6. . , :
() = 1 +2 +3 +4 +5 +6 = .
:
(m) = np ;
(m/n) = p c ,
n , m , m/n , , p .
: :
xi | -8 | i | -4/3 | ||||
i | 0,5 | 0,5 | i | 0,3 | 0,7 |
:
() = -80,5+10 0,5 = 1; () = - 4/30,3 + 2 0,7= 1.
:
- 8 0 1 10 - 4/3 0 1 2
( ) ( )
, , . , . , , , . .
3. . () ( ) D (x) Dx.
:
|
|
1) D (x) = ( 2) ( ())2 , .
2) - , .
, .
:
.
: D (x) = ( 2) ( ())2.
.
()) = 20,1+ 30,4 + 100,5 = 6,4.
. ( 2) = 220,1+ 320,4 + 1020,5 = 54;
D (x) = ( 2) ( ())2 = 54-6,42 = 13,04.
; , .
4. ( ). σ ().
() . , D (x) σ ().
: :
.
: () = 00,216+10,432+20,288+30,064=1,2;
( 2) = 00,216 +120,432 + 220,288 + 320,064 = 2,16;
D (x) = ( 2) ( ())2 = 2,16 1,22 = 0,72;
σ () = = = 0,84.
1. 7 , 4 . 4 . , , .
2. 3 . 0,7 . , , , .
3. n . . . , .
1) n = 4, p = 0,6; 2) n = 4, p = 0,5; 3) n = 3, p = 0,6;
4) n = 4, p = 0,7; 5) n =5, p = 0,8; 6) n = 3, p = 0,5.
4. , , n. , p.
1) n = 5, p = 0,8; 2) n = 4, p = 0,8; 3) n = 3, p = 0,6;
4) n = 6, p = 0,9; 5) n = 3, p = 0,8; 6) n = 7, p = 0,5.
5. k . p. .
1) n = 4, p = 0,3; 2) n = 4, p = 0,2; 3) n = 3, p = 0,4;
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4) n = 6, p = 0,4; 5) n = 3, p = 0,1; 6) n = 7, p = 0,3.
6. 4 . . . 0,6. , .