![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c717a4d3ebb93976aa865e09bcbe90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56c6def59a2f032873442ffe5742e1f.png)
![](https://img.xkw.com/dksih/QBM/2022/5/29/2990003390840832/2992719589236736/STEM/462bf4aa-dab7-4069-94cf-dccf91aaadac.png?resizew=614)
(1)在图二中画出2017年通州区全区完成全社会固定资产投资(柱状图),标出增长率并补全折线图;
(2)通过计算2011~2017这7年的平均增长率约为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e925ad9bcf419c237ad5ee26c890b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e925ad9bcf419c237ad5ee26c890b69.png)
(3)设2011~2017这7年全社会固定资产投资总额的中位数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c85481cd7e94130ef3aa05b4a39e79cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c85481cd7e94130ef3aa05b4a39e79cd.png)
复习时间![]() | 2 | 3 | 5 | 6 | 8 | 12 | 16 |
考试分数![]() | 60 | 69 | 78 | 81 | 85 | 90 | 92 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d77f777eebce034f228e1815b871fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d6a08f781b7569580d40e264afcdb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
考前一周复习投入时间(单位:h) | 政治成绩 | 合计 | |
优秀 | 不优秀 | ||
≥6h | |||
<6h | |||
合计 | 50 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
(2)经统计,该班共有25人政治成绩不低于85分,评定为优秀,而且在考前一周投入政治学可复习时间不低于6h共有30人,除去抽走的7位学生,剩下学生中考前一周复习政治的时间不少于6h政治不优秀共有6人,请填写下面的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83caa0ad94044a1e206b1cc0b3f85080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953e89f7e797bf8fe9ff31e0d2f66728.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12a76edbb3e98e3ff41c03401769d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50101047632b94dcd5cf8035b093cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e36492ded42e594c63855802dee601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32111fc0e76b9f7f325fd61b8cb6f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493889386e567f2aa3ce0e61111fd8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4474c49fafb86e3b5101dd5f7f774422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
0.01 | 0.005 | 0.001 | |
6.635 | 7.879 | 10.828 |
3 . 教育是阻断贫困代际传递的根本之策.补齐贫困地区义务教育发展的短板,让贫困家庭子女都能接受公平而有质量的教育,是夯实脱贫攻坚根基之所在.治贫先治愚,扶贫先扶智.为了解决某贫困地区教师资源匮乏的问题,某市教育局拟从5名优秀教师中抽选人员分批次参与支教活动.支教活动共分3批次进行,每次支教需要同时派送2名教师,且每次派送人员均从这5人中随机抽选.已知这5名优秀教师中,2人有支教经验,3人没有支教经验.
(1)求5名优秀教师中的“甲”,在这3批次支教活动中恰有两次被抽选到的概率;
(2)求第一次抽取到无支教经验的教师人数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
选考物理、化学、生物的科目数 | 1 | 2 | 3 |
人数 | 20 | 40 | 40 |
(2)从这100名学生中任选2名,记X表示这2名学生选考物理、化学、生物的科目数之差的绝对值,求随机变量X的数学期望;
(3)学校还调查了这100位学生的性别情况,研究男女生中纯理科生大概的比例,得到的数据如下表:(定文同时选考物理、化学、生物三科的学生为纯理科生)
性别 | 纯理科生 | 非纯理科生 | 总计 |
男性 | 30 | ||
女性 | 5 | ||
总计 | 100 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead9d6ff51996f3ebace6f212e11a9e4.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
附表:
0.10 | 0.05 | 0.010 | 0.001 | |
2.706 | 3.841 | 6.635 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
(1)求甲、乙两人投票方案不同的概率;
(2)若某人选择方案A或方案B,则对应方案可获得2票,选择方案C,则方案C获得1票,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78729f52ff739c2f7e13d186eb1cb737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f749bae1b9afebefadde3076ddfa4ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411a44b57e5fdbd6634f21a94144cfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cf205139a811c10efe85fade50b44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4329ebf7cb25521ea46d9626b4cfe0ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/dc661d9f-881c-442b-b6a2-4ddf249f039a.png?resizew=491)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/11/720f6f94-14a3-4bf0-ac69-4149f742405c.png?resizew=313)
(1)请根据所给数据求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(2)受到小李的鼓励,小王和小张决定在课后花更多的时间在数学学习上,小张把课后自主学习时间从20分钟增加到60分钟,而小王把课后自主学习时间从60分钟增加到100分钟.经过几个月的坚持,小张的数学成绩从50分提升到90分,但小王的数学成绩却只是从原来的100分提升到了115分.小王觉得很迷惑,课后学习时间每天同样增加了40分钟,为什么自己的成绩仅仅提升了十几分呢,为什么实际成绩跟预测的成绩差别那么大呢?
①请根据你对课后自主学习时间与数学成绩的关系的看法及对一元回归模型的理解,解答小王的疑惑;
②小李为了解答小王的疑惑,想办法拿到了上表中被污染的数据如下.据此,请在上图中补齐散点图,并给出一个合适的经验回归方程类型(不必求出具体方程,不必说明理由).
编号 | 14 | 15 | 16 | 17 | 18 |
x | 85 | 90 | 100 | 110 | 120 |
y | 113 | 114 | 117 | 119 | 119 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3fdfc8e7c65cd0198494cbf052f4e4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e669676429e6f533d55b12a66fe8d5ff.png)
(1)求5名优秀教师中的“甲”,在这3批次支教活动中恰有两次被抽选到的概率;
(2)求第一次抽取到无支教经验的教师人数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(3)求第二次抽选时,选到没有支教经验的教师的人数最有可能是几人?请说明理由.
饮食指数表
20 | 21 | 21 | 25 | 32 | 33 |
36 | 37 | 42 | 43 | 44 | 45 |
45 | 58 | 58 | 59 | 61 | 66 |
74 | 75 | 76 | 77 | 77 | 78 |
78 | 82 | 83 | 85 | 86 | 90 |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/a701b321-dcbc-492a-bd1f-8d3aa8c86231.png?resizew=277)
(1)填表,并根据小概率值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead9d6ff51996f3ebace6f212e11a9e4.png)
月收入4000元及以下 | 月收入4000元以上 | 合计 | |
主食蔬菜 | |||
主食肉类 | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
附:参考公式及临界值表:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dc70b5e1ba847b9918a50f67bfbe8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e293b9e2b3fcdc1cdf527d8408fdc97.png)
![]() | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
![]() | 38 | 40 | 44 | 46 | 48 | 50 | 52 | 56 |
![]() | 45 | 55 | 61 | 63 | 65 | 66 | 67 | 68 |
(1)请补齐表格中 8 组数据的散点图,并判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a5b1c19e4c57f1d259f8269e551c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a34dd2aaeb2144ea4d31339894b62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/2ef69b7f-a5c8-4725-a0b1-537c1fd9e5a5.png?resizew=203)
(2)若(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e0b2ffe1b988474911d9677a442dc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a347a381b852017a7700458c8f371d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
年份 | 2006 | 2007 | 2008 | 2009 |
高考上线人数 | 116 | 172 | 220 | 260 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb8b5f0ffe0a3eec01f91f2e9a5db687.png)
年份 | 2006 | 2007 | 2008 | 2009 |
年份代码 | 1 | 2 | 3 | 4 |
实际上线人数 | 116 | 172 | 220 | 260 |
模拟上线人数 |
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e8e4a5f8072ab76d137897a7e1287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3736e86e2ba6a1a0eb7b9d45516cdc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7a262d36d4d0f2cae62127aab1bd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb8b5f0ffe0a3eec01f91f2e9a5db687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/c67de502-ef8b-4e3d-bb95-85ada8c8fb78.png?resizew=223)