时间/年 | 主要飓风数量 | |
1921—1930 | 1 | 17 |
1931—1940 | 2 | 16 |
1941—1950 | 3 | 29 |
1951—1960 | 4 | 33 |
1961—1970 | 5 | 27 |
1971—1980 | 6 | 16 |
1981—1990 | 7 | 16 |
1991—2000 | 8 | 27 |
2001—2010 | 9 | 33 |
(2)借助图象,尝试求出形如正弦型函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e89ee59ead971eef5c3406b8d49a57f.png)
(3)使用数学软件找到最佳拟合的正弦型函数.
年份 | GDP/亿元 | 年份 | GDP/亿元 |
1997 | 79715.0 | 2002 | 121717.4 |
1998 | 85195.5 | 2003 | 137422.0 |
1999 | 90564.4 | 2004 | 161840.2 |
2000 | 100280.1 | 2005 | 187318.9 |
2001 | 110863.1 | 2006 | 219438.5 |
(2)建立年份为解释变量,GDP为响应变量的一元线性回归模型,并计算残差;
(3)根据你得到的一元线性回归模型,预测2017年的GDP,看看你的预测值与实际的GDP的误差是多少?(2017年GDP的实际值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07730c33e50212b01e4754c4ee6ad7f3.png)
(4)你认为这个模型能较好地刻画GDP和年份的关系吗?请说明理由
(5)随着时间的发展,又收集到2007~2016年的GDP数据如下:
年份 | GDP/亿元 | 年份 | GDP/亿元 |
2007 | 270232.3 | 2012 | 540367.4 |
2008 | 319515.5 | 2013 | 595244.4 |
2009 | 349081.4 | 2014 | 643974.0 |
2010 | 413030.3 | 2015 | 689052.1 |
2011 | 489300.6 | 2016 | 744127.2 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
豆类 | 黄豆 | 豇豆 | 青毛豆 | 豌豆(鲜) | 四季豆 |
脂肪含量/kg | 0.0184 | 0.0002 | 0.0057 | 0.0003 | 0.0004 |
热量/kJ | 1726 | 108 | 527 | 336 | 130 |
(2)观察散点图的趋势,如果能看成线性关系,请在图中画出一条直线来近似的表示这种关系,并计算豆类脂肪含量与热量的相关系数.
物理 | 64 | 61 | 78 | 65 | 71 |
数学 | 66 | 63 | 88 | 76 | 73 |
(2)若x与y具有线性相关关系,试求变量y对x的回归方程并求变量x对y的回归方程.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/78c8ce30-1e87-46d5-b048-cb4f15fb6282.png?resizew=306)
温差x(℃) | 8 | 9 | 10 | 11 | 12 |
发芽数y(个) | 23 | 24 | 26 | 27 | 30 |
(2)用直线l的方程来拟合这组数据的相关关系,若直线l过散点图中的中间点(即点(10,26)),且使发芽数的每一个观察值与直线l上对应点的纵坐标的差的平方之和最小,求出直线l的方程;
(3)用(2)中求出的直线方程预测当温度差为15℃时,蔬菜种子发芽的个数.
年份 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 |
年份代码![]() | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
风力发电量![]() | 955.8 | 1412 | 1599.8 | 1857.7 | 2370.7 | 2972.3 | 3659.7 | 4060.3 | 4664.7 |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/63230deb-67a3-4686-9a39-9f063c719ed8.png?resizew=320)
(1)根据散点图分析
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)根据相应数据计算得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe4d364a5d808c4e600fadb1a76bfbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ae426b927b6925088d12cf0320148a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ea0d167011973bf4769afe26c22f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
附:回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ec30e9316c79d956b7c9a483a91632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ebff20f21ae41fd8d1f1e3145895842.png)
年份 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
年份代码x | 1 | 2 | 3 | 4 | 5 | 6 |
紫皮石斛产量y(吨) | 3200 | 3400 | 3600 | 4200 | 7500 | 9000 |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/19/a79934fb-5192-4551-86ae-6a52962bb613.png?resizew=284)
(1)根据散点图判断,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4495340a1576f9c45de650fdaeffbdf6.png)
(2)经计算得下表中数据,根据(1)中结果,求出y关于x的回归方程;
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
3.5 | 5150 | 8.46 | 17.5 | 20950 | 3.85 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d963566fab1df041fc425c96ed1c1d4.png)
(3)龙陵县计划到2025年底实现紫皮石斛年产量达1.5万吨,根据(2)所求得的回归方程,预测该目标是否能完成?(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f22b4889a93bf208088759f0a1b5ed.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e21a60230ad30402ae5e44d1d4d039b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f149458ffc83c8f613f84386f529f476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc13a607ac0c7f76d252d7cb1bb040fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/e362a63c-6664-4159-9758-de62b9be8d80.png?resizew=341)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
年龄 | 23 | 27 | 39 | 41 | 45 | 49 | 50 | 53 | 54 | 56 | 57 | 58 | 60 | 61 |
脂肪 | 9.5 | 17.8 | 21.2 | 25.9 | 27.5 | 26.3 | 28.2 | 29.6 | 30.2 | 31.4 | 30.8 | 33.5 | 35.2 | 34.6 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7f022c73a38be031f2ecb27b5bcabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c42ccf6073443f25d20452e4caba2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90deff03763ffbdeec8eecd064f7bf5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb65d705598f522488a7228a14a627d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28baf3cc894e08cfeea1e8915e1a686c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be51f093f5ba4075695c18ee2b98f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b2cc09ad09843cb01738bcc994536c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef99b1f3b08ac5a491d20f92c4798906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cbff272f1458b522d211e484bbd4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073b810bd70df90e0d8683914e531e26.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636ecdba93ad595949a52e9b7750a58.png)
③方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5877892024791416bfc987084f3989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f7efc78c77ee24af1d1f5af1ef82a7.png)
④y与x正相关.
以上说法正确的是( )
A.①③④ | B.②③ | C.②④ | D.①②④ |