... 2 0 -2 2 2 2- 2 4 2 4 -2 6 2 6 -2 8 2 8-3 0 in 7 14 33 27 19 25 ,74x = ,2, 30xs =,N=100. Nếu X tuân thep phân phối chuẩn thì 122 25 ,74 20 25 ,2, 30 2, 3074( ) ( ) ( 1,63) ( 2, 50)p−−=Φ −Φ =Φ − −Φ − (2, 50) ... −Φ = Lớp 2 0 -2 2 2 2- 2 4 2 4 -2 6 2 6 -2 8 2 8-3 0 in 7 14 33 27 19 ip 0,0516 0,1 720 0, 320 3 0 ,29 27 0,1634 ,.iin Np= 5,16 17 ,20 32, 03 29 ,27 16,34 ,22 22( )(7 5,16) (19 16,34)1,88995,16 ... 12, 62% đến 23 ,38% d. 25 hqn = ,28 5hqx = ,20 ,41hqs = 1 1 0,98 0, 02 γ=−=− = (0, 02; 24 )2, 492t = 20 ,41 20 ,4 128 5 2, 4 92. 28 5 2, 4 92. 25 25 hqhq hqhq hqhqxt xtnnssµµ− ≤≤ ⇒ − ≤ ++ ≤ Vậy 27 4,83 29 5,17kg...