... thi´ˆet H : p 0 = 0, 9 (H < 0, 9)α = 0, 01 −→ 1 − α = 0, 99 =⇒ −u1−α= −2, 32 6f =1 60 200 = 0, 8u 0 =f − p 0 p 0 (1 − p 0 )√n = 0, 8 − 0, 9√ 0, 9 × 0, 1√ 200 = − 0, 1 0, 3 .14, 14 = ... ngh˜ia α = 0, 01 th`ı u1−α2= u 0, 995= 2, 58.T`’u c´ac s´ˆo liˆe.u ¯d˜a cho ta c´ofn1= 20 100 = 0, 2; fn2= 36 1 20 = 0, 3 p∗= 100 × 0, 2 + 1 20 × 0, 3 100 + 1 20 = 0, 227 =⇒ ... 24255,62549, 5 − 50 49,75 6 298,5 148 50, 37 5 50 − 50, 5 50, 25 2 100 ,5 505 0,12525 1 231 ,75 606 95 ,06 2Ta c´o 1 − α = 0, 99 =⇒ 1 −α2= 0, 995Phˆan vi.Student m´’uc 0, 995 v´’oi 24 bˆa.c...