题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124617-64619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124617-57309.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124617-53155.png)
解析
试题分析:设被污损的数字为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124618-23839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124618-73128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124618-19058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124619-50433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124619-53990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124619-76676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124619-12888.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124618-23839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124620-76325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124620-39488.png)
核心考点
试题【图是甲、乙两人在次综合测评中的成绩的茎叶图,其中一个数字被污损;则甲的平均成绩超过乙的平均成绩的概率为 .】;主要考察你对用样本的频率分布估计总体分布等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124604-14991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124604-64712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124604-64712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124604-23753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-90954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-75772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-92716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-96522.jpg)
(1)在这
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-92716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
(2)从这
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-92716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124606-81085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124606-49101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124606-49101.png)
(3)以这
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124605-92716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124603-79705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124606-46276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124559-95941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124559-63188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124546-65696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124546-65696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124546-54191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124547-48725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124547-44862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124547-40615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124547-83309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124548-72445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124548-66724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124548-62498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124549-79187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124549-10586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124549-79187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124546-65696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124546-54191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124547-44862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124549-77110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124547-48725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124549-12827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124550-96512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124550-10259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124550-86818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124549-79187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124551-22503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124548-62498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124551-95422.png)
(Ⅰ)请把两队身高数据记录在如图所示的茎叶图中,并指出哪个队的身高数据方差较小(无需计算);
(Ⅱ)现从两队所有身高超过
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124551-22503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124546-54191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124541-65814.jpg)
(I)估计这次测试数学成绩的平均分;
(II)假设在[90,100]段的学生的数学成绩都不相同,且都超过94分.若将频率视为概率,现用简单随机抽样的方法,从95,96,97,98,99,100这6个数中任意抽取2个数,有放回地抽取了3次,记这3次抽取中,恰好是两个学生的数学成绩的次数为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124541-31877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124541-31877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124541-24114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124538-64587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124538-51367.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124538-64587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124538-64587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026124538-51367.png)
A.众数 | B.平均数 | C.中位数 | D.标准差 |
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