解题方法
1 . 现代医院使用的市值较高、体积较大的医疗设备有
,核磁共振、
系统、
、工频
光机、推车式
型超声波诊断仪,体外冲击波碎石机、高压氧舱、直线加速器等.这些医疗器械的日常维护费用高,某科研团队对某医院的
医疗设备的使用年限
(单位:年)与维护维修费用
(单位:万元)的统计数据如下表所示:
(1)根据上表数据,计算
与
的相关系数
,并说明
与
的线性相关性的强弱;
(2)求
关于
的线性回归方程,当该种机械设备维护维修费用是
万元时,试估计使用年限.
可能用到的公式和数据:
,当
时,表明
与
的相关性很强;当
时,表明
与
的相关性一般;当
时,表明
与
的相关性很弱.
,
.
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7f05a22e880457abe1f9ebfcf1af6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be09561ce42374943a975c225251a9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84f86a989b2d76d0bf0332238967bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674e31dbbc3c338972a2fa85d588afae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e8babee63bfc889ae5a34632284bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7f05a22e880457abe1f9ebfcf1af6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
使用年限 | |||||
维护维修费用 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963c5fcd4821896c4eb6d5344a5e7738.png)
可能用到的公式和数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2ad9ce159ea79ea55fd009af6e8237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2968483eca8dc1ffd3ea6410f1009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da1f4565ae34eea553dc9298696618c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad3e9fca651e7fd78af51be6b404c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c226c805bf76bc0ad35c45806feb73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cfe3f148e75bd4c9201f2e30f48d4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd17e2d3bb933331fc9582d1a6772677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a853c21c7fac95adf17f0792823ca9f4.png)
您最近一年使用:0次
2021-08-04更新
|
238次组卷
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2卷引用:广西北海市2020-2021学年高一下学期期末数学试题