![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
(1)若工厂已生产3件减排器,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)已知一件减排器的利润如下表:
等级 | 一等品 | 二等品 | 不合格品 |
利润(万元/件) | 1 | 0.5 | ![]() |
②若工厂要增加产量,需引入设备和更新技术,但增加
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef9f09eda89e30003bbbdd353bc5f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d06152745d9228d14dc51132e358e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e946baf1316ac1f219398ecedadf6cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d601a8e9eafdb33760fed9eee1151267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea40db0b5cfaf67d2bac5210dd7eb51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f95463e4696bcb6ed28581bad689d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be7581dbbccda50e5d5cd18056ddea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701554763bdbbf2689a8dae07608da38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b685c556cc423e4833c1dc671a134cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285912b40e1dce8bfc029df88115c961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966dfe9109671c587892bd32f0b6699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604b1c2d5e22529ef8ced8f86d83db8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ee5940db3eca3be22205d12bae26e0.png)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701554763bdbbf2689a8dae07608da38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce043cc20ce0d8d4a67adc0331bd9ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285912b40e1dce8bfc029df88115c961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701554763bdbbf2689a8dae07608da38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba602bfa3a3ffb4fb43dc0f704a7f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde66f0ef8ea3ac6d6ac91a93ba69ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d520a09176d0553629a1dcb9b24cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717d7ef75faae796bfa5d20e7f375594.png)
(1)求销售利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当产量为多少万箱时,该厂在生产中所获得利润最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51b01f9302c90fab7c4d9b01e54682c.png)
A.5.3 | B.4.6 | C.7.8 | D.6 |
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/d9157ef2-d1ab-4d37-bb91-ef933827076a.png?resizew=566)
(1)请根据图①,从两种活动方案中,为该公司选择一种较为有利的活动方案(不必说明理由);
(2)为制定本年度该产品的销售价格,现统计了8组售价xi(单位:元/件)和相应销量y(单位:件)(i=1,2,…8)并制作散点图(如图②),观察散点图可知,可用线性回归模型拟合y与x的关系,试求y关于x的回归方程(系数精确到整数);
参考公式及数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24acc59e9b9aefe624f00d094e300b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa910ca3b6e47efa6c89c2f2aafc3de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9925203e2bf22e4a0addbd3b6b9cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9925203e2bf22e4a0addbd3b6b9cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe5d5675ce383a857ac3d5bbd73915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f658af06239dadb5e0a75e1c4ac25d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
(3)公司策划部选
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d817fdfd0664c627b30c882a2bd53c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3617671ab9daae844ca0a46066fe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
![]() | ![]() | |
![]() | 52446.95 | 122.89 |
![]() | 124650 | |
相关指数 | R![]() | R![]() |
相关指数:R2=1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1df59bc96e863a1e12cf49873d6dc6c.png)
(i)试比较R12,R22的大小(给出结果即可),并由此判断哪个模型的拟合效果更好;
(ii)根据(1)中所选的方案和(i)中所选的回归模型,求该产品的售价x定为多少时,总利润z可以达到最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9669d6dac0efe3be565cb0cfc66f47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe0f61ec213734b7ae080719fa5cdd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74b0aa7a6f6dcab7d9101b98504ae2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
(2)已知设备升级前,单位时间的产量为a件,每件产品的利润为1元,设备升级后,在正常运行状态下,单位时间的产量是原来的4倍,且出现了高端产品,每件产品成为高端产品的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(i)请用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe0f61ec213734b7ae080719fa5cdd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71701db4b413f2364dbcbd612fbc8a67.png)
(ii)设备升级后,在确保控制系统中元件总数为奇数的前提下,分析该设备能否通过增加控制系统中元件的个数来提高利润.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6ce1bc485610edba2eac1668af5d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f699be9ed7250daf32ce8b941c60e143.png)
(1)写出年利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)年产量为多少千件时,该企业生产此产品所获年利润最大?最大利润是多少?
(注:年利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
周一 | 无雨 | 无雨 | 有雨 | 有雨 |
周二 | 无雨 | 有雨 | 无雨 | 有雨 |
收益 | 30万元 | 20万元 | 15万元 | 10万元 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
已知下周一和下周二有雨的概率都为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94834b1a3475cc14ef5c96250528d7a.png)
(1)若不额外聘请工人,求基地的预期收益;
(2)该基地是否应该额外聘请工人,请说明理由.
9 . 某超市计划按月订购一种酸奶,每天进货量相同,进货成本每瓶4元,售价每瓶6元,未售出的酸奶降价处理,以每瓶2元的价格当天全部处理完.根据往年销售经验,每天需求量与当天最高气温(单位:℃)有关.如果最高气温不低于25,需求量为500瓶;如果最高气温位于区间[20,25),需求量为300瓶;如果最高气温低于20,需求量为200瓶.为了确定六月份的订购计划,统计了前三年六月份各天的最高气温数据,得下面的频数分布表:
最高气温 | [10,15) | [15,20) | [20,25) | [25,30) | [30,35) | [35,40) |
天数 | 2 | 16 | 36 | 25 | 7 | 4 |
以最高气温位于各区间的频率估计最高气温位于该区间的概率.
(1)求六月份这种酸奶一天的需求量不超过300瓶的概率;
(2)设六月份一天销售这种酸奶的利润为Y(单位:元),当六月份这种酸奶一天的进货量为450瓶时,写出Y的所有可能值,并估计Y大于零的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254085ae2868cb0371a3844cac3fd14d.png)
最高 气温 | [10, 15) | [15, 20) | [20, 25) | [25, 30) | [30, 35) | [35, 40) |
天数 | 2 | 16 | 36 | 25 | 7 | 4 |
(1)求六月份这种酸奶一天的需求量X(单位:瓶)的分布列.
(2)设六月份一天销售这种酸奶的利润为Y(单位:元),当六月份这种酸奶一天的进货量n(单位:瓶)为多少时,Y的数学期望达到最大值?