, , .
, . , .
,
F(x) = P(X £ x)
P(X £ x) - , X , x.
f(x) , a b (b > a)
P(a < X < b) =
, , , , , . . , , . .
:
. 10.3.
. 10.3. (1) (2) (2)
: f(x) , s (s > 0), () , , . = 0 s = 1 .
a 3s 99,73%, .. . 3s .
. . , , .. x1, x2... xn, . x , n - . . 10.1 , .
. 10.1.
,
, | ||
() | , . f = n-1 - , | |
(n-1), . (n < 30), , (t-), t
|
|
( )
a s. .
( , ). , 1-a, a - ( a = 0,05). 1-a :
, a = 0,05 f = 5, 2,57 .
10.6. .
. . - .
10.4. - 4,32; 4,35; 4,36; 4,98; 4,38; 4,34. .
, . , , . . . (n = 4 - 10) Q-. , , 3s - , 3 , .
Q- :
() Q-. , .
, 10.4, :
. Q
|
|
n= 6 P = 0,90 Q = 0,48. , = 4,98 .
, . 10.1, : = 4,35; = 5,00×10-4; = 2,24×10-2; = 1,00×10-2; = 5,15×10-3; (a=0,05) = 0,03. , = 4,350,03.
, (3), . , , (2), . , - 4,35000,028, .