1 . 一汽车厂生产A,B,C三类轿车,每类轿车均有舒适型和标准型两种型号,某月的产量如下表(单位:辆):
按类型分层抽样的方法在这个月生产的轿车中抽取50辆,其中有A类轿车10辆.
(1)求z的值.
(2)用分层抽样的方法在C类轿车中抽取一个容量为5的样本.将该样本看成一个总体,从中任取2辆,求至少有1辆舒适型轿车的概率;
(3)用随机抽样的方法从B类舒适型轿车中抽取8辆,经检测它们的得分如下:9.4, 8.6, 9.2, 9.6, 8.7, 9.3, 9.0, 8.2.把这8辆轿车的得分看作一个总体,从中任取一个数,求该数与样本平均数之差的绝对值不超过0.5的概率.
轿车A | 轿车B | 轿车C | |
舒适型 | 100 | 150 | z |
标准型 | 300 | 450 | 600 |
(1)求z的值.
(2)用分层抽样的方法在C类轿车中抽取一个容量为5的样本.将该样本看成一个总体,从中任取2辆,求至少有1辆舒适型轿车的概率;
(3)用随机抽样的方法从B类舒适型轿车中抽取8辆,经检测它们的得分如下:9.4, 8.6, 9.2, 9.6, 8.7, 9.3, 9.0, 8.2.把这8辆轿车的得分看作一个总体,从中任取一个数,求该数与样本平均数之差的绝对值不超过0.5的概率.
您最近一年使用:0次
2019-01-30更新
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2333次组卷
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28卷引用:江西省宜春市奉新县第一中学2016-2017学年高一下学期期末考试数学(文)试题
江西省宜春市奉新县第一中学2016-2017学年高一下学期期末考试数学(文)试题江西省南昌市第十中学2020-2021学年高二上学期第一次月考数学试题2009年普通高等学校招生全国统一考试文科数学(山东卷)(已下线)2011-2012年广东省培正中学高二上学期期中考试文科数学(已下线)2011-2012学年四川省三台县芦溪中学高二上学期数学检测题(2)(已下线)2014届北京市东城区高三3月质量调研文科数学试卷(已下线)2015届安徽省黄山市屯溪一中高三上学期期中文科数学试卷2015-2016学年辽宁省鞍山一中高一下期中数学试卷2016-2017学年河北武邑中学高二上周考8.28理数试卷黑龙江省双鸭山市第一中学2017届高三全真模拟(第四次)考试数学(文)试题黑龙江省齐齐哈尔市第八中学2017-2018学年高二9月月考数学试题人教B版(2019) 必修第二册 过关斩将 第五章 5.4 统计与概率的应用人教A版(2019) 必修第二册 突围者 第十章 综合拓展提升河南省开封市第五中学2019-2020学年高一下学期3月月考数学试题湖南省衡阳市衡东县欧阳遇实验中学2019-2020学年高一上学期期末数学试题湖南省长沙市长郡、雅礼、一中、附中2020-2021学年高三上学期11月联合编审名校卷数学试题(已下线)专题11.2 古典概型与几何概型 (精练)-2021届高考数学(文)一轮复习学与练(已下线)考点46 古典概型-备战2021年高考数学(文)一轮复习考点一遍过陕西省西安中学2021届高三下学期第六次模拟数学(文)试题江苏省无锡市江阴市2021-2022学年高二上学期期初摸底检测数学试题湖北省武汉市第二十三中学2021-2022学年高二上学期第一次月考数学试题广东省化州市第三中学2021-2022学年高二上学期期中数学试题沪教版(2020) 必修第三册 精准辅导 第13章 13.5(2) 估计总体的数字特征北京市海淀实验中学2021-2022学年高一下学期期中数学试题吉林省长春市农安县2021-2022学年高一下学期期末数学试题7.3频率与概率 同步练习-2021-2022学年高一上学期数学北师大版(2019)必修第一册2023版 湘教版(2019) 必修第二册 过关斩将 第5章 5.3 用频率估计概率(已下线)第十章 本章综合--数学思想训练【第二练】“上好三节课,做好三套题“高中数学素养晋级之路
名校
2 . 一支田径队共有运动员98人,其中女运动员42人,用分层抽样的方法抽取一个样本,每名运动员被抽到的概率都是
,则男运动员应抽取__________ 人.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a734873a608f0c070dec80b89d179754.png)
您最近一年使用:0次
2018-05-02更新
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738次组卷
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3卷引用:江西省宜春市奉新县第一中学2020-2021学年高二下学期第一次月考数学 (文) 试题
解题方法
3 . 某校高三文科
名学生参加了
月份的模拟考试,学校为了了解高三文科学生的数学、语文情况,利用随机数表法从中抽取
名学生的成绩进行统计分析,抽出的
名学生的数学、语文成绩如下表.
![](https://img.xkw.com/dksih/QBM/2016/11/24/1573175102668800/1573175108468736/STEM/f3283f214f89429eb4dce3557605b60d.png?resizew=276)
(1)将学生编号为:
,若从第
行第
列的数开始右读,请你依次写出最先抽出的
个人的编号(下面是摘自随机用表的第四行至第七行)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
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(2)若数学优秀率为
,求
的值;
(3)在语文成绩为良的学生中,已知
,求数学成绩“优”比“良”的人数少的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821b8672d030c240ff230a0174aa7a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://img.xkw.com/dksih/QBM/2016/11/24/1573175102668800/1573175108468736/STEM/f3283f214f89429eb4dce3557605b60d.png?resizew=276)
(1)将学生编号为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06265287273fe4d9d5d310bd9f6cfc96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9ba3f640f57c0cece089dfd19b4970.png)
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(2)若数学优秀率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ff2cca31ea3c1b99e23e4049b5044a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(3)在语文成绩为良的学生中,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4489d8b38621bf118184ab6275f10ba.png)
您最近一年使用:0次
2016-11-23更新
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343次组卷
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2卷引用:2017届江西吉安一中高三上期中考试文数试卷