名校
解题方法
1 . 噪声污染已经成为影响人们身体健康和生活质量的严重问题,为了了解声音强度
(单位:分贝)与声音能量
(单位:
)之间的关系,将测量得到的声音强度
和声音能量
(
,2,…,10)数据作了初步处理,得到如图散点图及一些统计量的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e264e9b9-1755-4763-a6d4-5684ce03080f.png?resizew=203)
表中
,
.
(1)根据散点图判断,
与
哪一个适宜作为声音强度
关于声音能量
的回归方程类型?(给出判断即可,不必说明理由)
(2)根据表中数据,求声音强度
关于声音能量
的回归方程;
(3)当声音强度大于60分贝时属于噪音,会产生噪音污染,城市中某点
共受到两个声源的影响,这两个声源的声音能量分别是
和
,且
.已知点
的声音能量等于声音能量
与
之和.请根据(1)中的回归方程,判断
点是否受到噪音污染的干扰,并说明理由.
附:对于一组数据
,
,…,
,其回归直线
的斜率和截距的最小二乘估计分别为:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7ff182bb0783379a6edeb77421e878.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2451fdae3c590a4099e9ad91e5edea9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc9acb5a6d75ab2983311e27a46a3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e264e9b9-1755-4763-a6d4-5684ce03080f.png?resizew=203)
表中
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940352631980032/1941712186056704/STEM/c8a1bfc2d773480fb5054acc154de6b1.png?resizew=61)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85dc83a0e5f8c817f4fbdcd540121c99.png)
(1)根据散点图判断,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dde1a4e110c6aaafb62e64e7e33c7db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495fa8d4d986aeffea885e54ce2da634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
(2)根据表中数据,求声音强度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
(3)当声音强度大于60分贝时属于噪音,会产生噪音污染,城市中某点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1ac49b4139636fb1809fe970b23a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1a0fd1ad044a9ecfcba672779bd678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea7ad079543f47fdbf23639650fa521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1ac49b4139636fb1809fe970b23a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1a0fd1ad044a9ecfcba672779bd678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
附:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98aab11e4aeb047cc67ab1e2e0f6628b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac12d7aba8ae2af22c2eeb2af9c6ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4036b4711529d0a752e0ba08a7acca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9ebbe62bcb439fe0b829c0f41318e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3b8718660325f60a02945188ab19c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3deeedaebd169c15ebb4665a706fd992.png)
您最近一年使用:0次
2018-05-09更新
|
875次组卷
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3卷引用:【全国百强校】北京市第四中学2019届高三高考调研卷文科数学试题(一)