... 8 ,47 32209 ,44 4 2 ,47 9. 2709 ,44 4 22 ,47 9.7µ⇒− ≤≤+. Vậy 22205,36 / 213 ,44 /kg mm kg mmµ≤≤. d. 01: 0 ,4; : 0,4Hp Hp= ≠ 0,1875 144 27tbf = = 0000,1875 0 ,4 5,025(1 ) 0 ,4. 0,6 144 tbtnfpUppn−−= ... 0H:170µ= 1: 170Hµ≠ 162, 64, 144 , 33 ,41 x ns= = = 0()tnxTsnµ−=→ (162, 64 170) 144 33 ,41 2, 644 tnT−= = − (0,01)2,58t = (0,01; 143 )||tnTt>: bác bỏ 0H, cải ... 20: 40 0Hσ= 21: 40 0Hσ≠ Page 16 2220( 1)clnsσ−Χ=→ 22(25 1)20 ,4 4001 24, 9 94 −Χ= = 22(0,975; 24) (1 ; 1)212 ,4 nα−−Χ=Χ= 22(0,025; 24) ( ; 1)239 ,4 nα−Χ=Χ...