... 797;∞)x = 123 1,75 25 = 49, 27 .s 2 =60695,06 25 − (49, 27 ) 2 = 24 27, 8 − 24 27, 53 = 0, 27 s 2 = 25 24 0, 27 = 0, 28 12 =⇒ s= 0, 53Gi´a tri.quan s´at t0=|(49 ,27 −50)|√ 25 0,53= 6, ... uinix 2 ini48 − 48, 5 48 ,25 2 96,5 4656, 125 48, 5 − 49 48,75 5 24 3,75 118 82, 8 12 49 − 49, 5 49 ,25 10 4 92, 5 24 255, 625 49, 5 − 50 49,75 6 29 8,5 14850,37550 − 50, 5 50 ,25 2 100,5 5050, 125 25 123 1,75 ... N´ˆeu χ 2 0< χ 2 n−1,α 2 ho˘a.c χ 2 0> χ 2 n−1,1−α 2 (χ 2 0∈ Wα) th`ı b´ac b’o H v`a ch´ˆap nhˆa.n H.• N´ˆeu χ 2 n−1,α 2 < χ 2 0< χ 2 n−1,1−α 2 (χ 2 0/∈ Wα) th`ı...