1 . 某特色餐馆开通了美团外卖服务,在一周之内的某特色菜外卖份数
(份)与收入
(元)之间有如下的对应数据:
![](https://img.xkw.com/dksih/QBM/2018/7/8/1984220637487104/1985715957899264/STEM/2bc76a3cb9c24403bf9c5edc91e42746.png?resizew=649)
(1)画出散点图;
![](https://img.xkw.com/dksih/QBM/2018/7/8/1984220637487104/1985715957899264/STEM/d50483f6ca464de99c8d269d1922acab.png?resizew=273)
(2)求回归直线方程;
(3)据此估计外卖份数为12份时,收入为多少元.
注:参考公式:线性回归方程系数公式
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40ea92b18e6a33485441818d471945f.png)
参考数据:
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/2018/7/8/1984220637487104/1985715957899264/STEM/2bc76a3cb9c24403bf9c5edc91e42746.png?resizew=649)
(1)画出散点图;
![](https://img.xkw.com/dksih/QBM/2018/7/8/1984220637487104/1985715957899264/STEM/d50483f6ca464de99c8d269d1922acab.png?resizew=273)
(2)求回归直线方程;
(3)据此估计外卖份数为12份时,收入为多少元.
注:参考公式:线性回归方程系数公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9705b34ce41bc38410806aae00089099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40ea92b18e6a33485441818d471945f.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff8994704df1c297dee1ebaec19c57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83b2e51d7a12d3c3b63eb05a631e7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc5ea4f4e91392870dc8fc7b63c033a.png)
您最近一年使用:0次
2 . 2015男篮亚锦赛决赛阶段,中国男篮以
连胜的不败成绩赢得第
届亚锦赛冠军,同时拿到亚洲唯一
张直通里约奥运会的入场券.赛后,中国男篮主力易建联荣膺本届亚锦赛
(最有价值球员),下表是易建联在这
场比赛中投篮的统计数据.
注:(1)表中
表示出手
次命中
次;
(2)
(真实得分率)是衡量球员进攻的效率,其计算公式为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119b20cd4825caeb85d554f106009a19.png)
(1)从上述
场比赛中随机选择一场,求易建联在该场比赛中
超过
的概率;
(2)我们把比分分差不超过
分的比赛称为“胶着比赛”.为了考验求易建联在“胶着比赛”中的发挥情况,从“胶着比赛”中随机选择两场,求易建联在这两场比赛中
至少有一场超过
的概率;
(3)用
来表示易建联某场的得分,用
来表示中国队该场的总分,画出散点图如图所示,请根据散点图判断
与
之间是否具有线性相关关系?结合实际简单说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbecbd7e92dcbe1766462fcf40066de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99dee7c017d84e474d99a42c00c6ff28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
比分 | 易建联技术统计 | |||
投篮命中 | 罚球命中 | 全场得分 | 真实得分率 | |
中国![]() | ||||
中国![]() | ||||
中国![]() | ||||
中国![]() | ||||
中国![]() | ||||
中国![]() | ||||
中国![]() | ||||
中国![]() | ||||
中国![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd3928677a680eaafb8ab1abb292aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1509c61e6bd58b1dea8330bf6f0c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119b20cd4825caeb85d554f106009a19.png)
(1)从上述
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1509c61e6bd58b1dea8330bf6f0c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc00118b6316f277160328cf6a27a5e.png)
(2)我们把比分分差不超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1509c61e6bd58b1dea8330bf6f0c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beddb9806191a43e6c6b194300981f11.png)
(3)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2017/12/7/1833520723820544/1834899076841472/STEM/1942ceb4387c4e15918e60b7a02bdc90.png?resizew=224)
您最近一年使用:0次
2017-02-17更新
|
1302次组卷
|
3卷引用:广西玉林、贵港市2017届高三下学期质量检测考试数学(文)试题