某校从高一年级随机抽取了\(20\)名学生第一学期的数学学期综合成绩和物理学期综合成绩,列表如下:
学生序号 | \(1\) | \(2\) | \(3\) | \(4\) | \(5\) | \(6\) | \(7\) | \(8\) | \(9\) | \(10\) |
数学学期综合成绩 | \(96\) | \(92\) | \(91\) | \(91\) | \(81\) | \(76\) | \(82\) | \(79\) | \(90\) | \(93\) |
物理学期综合成绩 | \(91\) | \(94\) | \(90\) | \(92\) | \(90\) | \(78\) | \(91\) | \(71\) | \(78\) | \(84\) |
学生序号 | \(11\) | \(12\) | \(13\) | \(14\) | \(15\) | \(16\) | \(17\) | \(18\) | \(19\) | \(20\) |
数学学期综合成绩 | \(68\) | \(72\) | \(79\) | \(70\) | \(64\) | \(61\) | \(63\) | \(66\) | \(53\) | \(59\) |
物理学期综合成绩 | \(79\) | \(78\) | \(62\) | \(72\) | \(62\) | \(60\) | \(68\) | \(72\) | \(56\) | \(54\) |
规定:综合成绩不低于\(90\)分者为优秀,低于\(90\)分为不优秀.
\((\)Ⅰ\()\)对优秀赋分\(2\),对不优秀赋分\(1\),从这\(20\)名学生中随机抽取\(2\)名学生,若用\(ξ\)表示这\(2\)名学生两科赋分的和,求\(ξ\)的分布列和数学期望;
\((\)Ⅱ\()\)根据这次抽查数据,列出\(2×2\)列联表,能否在犯错误的概率不超过\(0.025\)的前提下认为物理成绩与数学成绩有关?
附:\(K^{2}= \dfrac {n(ad-bc)^{2}}{(a+b)(c+d)(a+c)(b+d)}\),其中\(n=a+b+c+d\).
\(P(K^{2}\geqslant k_{0})\) | \(0.50\) | \(0.40\) | \(0.25\) | \(0.15\) | \(0.10\) | \(0.05\) | \(0.025\) | \(0.010\) | \(0.005\) | \(0.001\) |
\(k_{0}\) | \(0.455\) | \(0.708\) | \(1.323\) | \(2.072\) | \(2.706\) | \(3.841\) | \(5.024\) | \(6.635\) | \(7.879\) | \(10.828\) |