... 25 − 6, 75 ) 1 6,5 -4 -4 16[6, 75 − 7, 25) 2 7, 0 -3 -6 18 [7, 25 − 7, 75 ) 5 7, 5 -2 -1 0 20 [7, 75 − 8, 25) 11 8 -1 -1 1 11[8, 25 − 8, 75 ) 18 8,5 0 0 0[8, 75 − 9, 25) 9 9 1 9 9[9, 25 − 9, 75 ) 3 9,5 ... ¯d’u’o.c k´ˆet qu’a sau:14 18 22 30 36 28 42 79 36 52 15 479 5 16 27 111 37 63 1 27 23 31 70 27 1130 1 47 72 37 25 7 33 29 35 41 48 1529 73 26 15 26 31 57 40 18 85 28 3222 36 60 41 35 26 20 58 33 ... x = 41, 05; s= 27, 99D¯ˆo.tin cˆa.y 1 − α = 0, 95 =⇒ 1 −α2= 0, 975 . Tra b’ang phˆan vi.chu’ˆan ta c´ou0, 975 = 1, 96.Do ¯d´o ε = 1, 96. 27, 99√59= 7, 13.x − 7, 13 = 33, 92; x + 7, 13 = 48, 18Vˆa.y...