名校
1 .
年,
基站正式获得国家工信部人网批准,自此,中国进入“
时代”.相比于
、
具有“更高网速、低延时高可靠、低功率海量连接”的特点,目前这一技术被广泛应用于工业、能源、教育等多个领域.某运营商为了解
网络使用满意度,从运营系统中选出
名客户进行调查,其中,青年(
岁)客户与中老年(
岁)客户的比例为
,在
名持满意态度的客户中,中老年客户的比例为
.
(1)完成
列联表,根据小概率值
的独立性检验,能否认为对
网络的满意度和年龄有关联?
(2)为更好地推广
网络,运营商计划开展抽奖活动,规则如下:参与者从装有
个红球,
个白球(形状,大小,质地完全相同)的箱子中随机摸一个球,摸出后放回,摸到红球奖励
元充值券,摸到白球奖励
元充值券.若计划有
名客户参与抽奖,求运营商需提供充值券总金额
的数学期望.
附:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f95463e4696bcb6ed28581bad689d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27772ded41cb6beecf19d5da91e82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27772ded41cb6beecf19d5da91e82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2fa81cd9642a53eb39154d7f276b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27772ded41cb6beecf19d5da91e82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27772ded41cb6beecf19d5da91e82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b685c556cc423e4833c1dc671a134cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3912d108a1485738489bc5961c7fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a46bc46ced042d9eaab20aaecdaa3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1dcdac71e394e495d069f64e1f1ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc011a0862d1f780331f1e9f8a467a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e986b253b15e4f9480a988b72cc3aab.png)
(1)完成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead9d6ff51996f3ebace6f212e11a9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27772ded41cb6beecf19d5da91e82a.png)
年龄 |
| 合计 | |
满意 | 不满意 | ||
青年( | |||
老年( | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b27772ded41cb6beecf19d5da91e82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.01 | 0.05 | 0.025 | |
2.706 | 3.841 | 5.024 |
您最近一年使用:0次
2023-08-05更新
|
346次组卷
|
2卷引用:云南师范大学附属中学2023届高三第十次高考适应性考试数学试题