在“美丽乡村”评选活动中,某乡镇
个村的得分如下:
,这组数据的中位数和众数分别是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a12f6ba53ef362f9d027efb1c66fb4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23高一上·广东江门·开学考试 查看更多[4]
广东省实验中学附属江门学校2022-2023学年高一上学期开学考试数学试题(已下线)第02讲 用样本估计总体 (高频考点,精讲)-1安徽省合肥一六八中学2024届高三“九省联考”考后适应性测试数学试题(一)(已下线)专题08 平面向量、概率、统计、计数原理
更新时间:2022-09-28 23:03:17
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【推荐1】从某中学抽取
名同学,他们的数学成绩如下:
,
,
,
,
,
,
,
,
,
(单位:分),则这
名同学数学成绩的众数,第
百分位数分别为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbcf82603580ddba4cfdb4efde85a8d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17161b28b6ad8f57abc5b11e1b6c671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0c86435b0b5f7dabce768a0790c346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0c86435b0b5f7dabce768a0790c346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0c86435b0b5f7dabce768a0790c346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e398a06d8ffa9071cf32c3e9e73a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e398a06d8ffa9071cf32c3e9e73a1.png)
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A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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解题方法
【推荐2】有一组样本数据
,
,…,
,由这组数据得到新样本数据,
,
,…,
,其中
,c为非零常数,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79b9eaa5e7ab7a1e5c512b571914dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0695eba2ba2b0c50ef7d05c324689dad.png)
A.两组样本数据的样本方差相同 | B.两组样本数据的样本众数相同 |
C.两组样本数据的样本平均数相同 | D.两组样本数据的样本中位数相同 |
您最近一年使用:0次
单选题
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名校
【推荐1】有一组样本数据
,
,
,…,
,由这组数据得到新样本数据,其中
,
,
,…,
,
为非零常数,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9314bd1d7a6e070f4f2428f9a321804e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79b9eaa5e7ab7a1e5c512b571914dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ead2ee26983387f1eb5c478b149f6ef.png)
A.两组样本数据的样本平均数相同 | B.两组样本数据的样本中位数数相同 |
C.两组样本数据的样本标准差相同 | D.两组样本数据的样本极差不同 |
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【推荐2】已知样本数据为
、
、
、
、
、
、
,去掉一个最大值和一个最小值后的数据与原来的数据相比,下列数字特征一定不变的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9b42973c53907f09f2de384c42fc5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20c1e5866f81c045a596079ac4a7671.png)
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A.极差 | B.平均数 | C.中位数 | D.方差 |
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