ó .
0: θ = Δ 0, θ , , Δ 0 , . ϳ , . ³ . 4.1.
◄ 4.5 0 = 120 . . 10 x = 135 . ., s = 20 . . 0,05: ) , ; ) , .); ) , , 0,975.
. ) ó, , 0: . - 1: . σ2 , t - . . 4.1 . . (2,25 > 1,83), 0 , 5%- .
) a 1=135> a 0=120,
(. .). x (132,2;+∞).
,
, , t - , (-t, t)
.
:
, .
) 4.1 ). σ2 , s 2, t - (. . 4.1), n : . α=0,05, β=0,025 ( 1-β=0,975), 0=120, 1=135, s =20 : . n, n . , n =20, n =30, (, n =20 ), n =25 .
, 25 .►
4.1
= 0 | σ2 | |||
σ2 | ||||
p=p 0 | n |
, . 4.1.
.