作业帮关于数学线性回归的问题.求技术帝解答!高分!
来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/04/29 01:53:12
关于数学线性回归的问题.求技术帝解答!高分!
x1=[-6.1,-0.2,7.3,1.9,-1.3,-8.3,14,-7.2,-3.8,-6.8,3.7,14.8,1.9,14.1,1.9,9.9,7.7,4,9.8,10,-3.2,-1.2,-13,10.3,3.7,18,3.3,-1.3]
x2=[5,-1,9,-6,-1,-4,-2,-2,-2,0,6,2,2,0,0,2,1,-3,6,2,0,2,-9,7,0,3,-2,2]
x3=[1,14,-1,-6,1,2,2,6,0,13,-1,2,-7,10,-12,-11,-2,11,-11,15,8,-6,13,1,1,2,11,5]
x4=[4,6,14,-3,3,-13,-10,-7,13,7,-3,15,-5,38,-7,13,0,6,8,13,-1,3,-5,29,8,3,8,7]
x5=[0,3,4,2,1,-8,7,-8,0,-9,3,21,-5,7,7,7,6,4,13,11,-2,-1,-12,6,3,18,-6,-13]
x6=[9,-1,2,2,1,-6,6,6,6,-3,-5,0,-3,10,-5,4,-2,-2,5,-5,3,7,1,5,7,-8,3,7]
x7=[-2,7,0,0,1,2,4,-7,-5,4,0,4,-3,2,-5,2,3,4,2,-3,0,-3,-1,1,4,8,1,-7]
y=[-8,11,22,-8,-8,-12,8,-16,-8,5,7,28,5,30,2,7,11,8,15,33,-6,-4,-26,36,3,39,5,1]
希望可以找到x1、x2、x3、x4、x5、x6、x7对Y的影响.好像说要用逐步回归分析法……求问怎么做……
x1=[-6.1,-0.2,7.3,1.9,-1.3,-8.3,14,-7.2,-3.8,-6.8,3.7,14.8,1.9,14.1,1.9,9.9,7.7,4,9.8,10,-3.2,-1.2,-13,10.3,3.7,18,3.3,-1.3]
x2=[5,-1,9,-6,-1,-4,-2,-2,-2,0,6,2,2,0,0,2,1,-3,6,2,0,2,-9,7,0,3,-2,2]
x3=[1,14,-1,-6,1,2,2,6,0,13,-1,2,-7,10,-12,-11,-2,11,-11,15,8,-6,13,1,1,2,11,5]
x4=[4,6,14,-3,3,-13,-10,-7,13,7,-3,15,-5,38,-7,13,0,6,8,13,-1,3,-5,29,8,3,8,7]
x5=[0,3,4,2,1,-8,7,-8,0,-9,3,21,-5,7,7,7,6,4,13,11,-2,-1,-12,6,3,18,-6,-13]
x6=[9,-1,2,2,1,-6,6,6,6,-3,-5,0,-3,10,-5,4,-2,-2,5,-5,3,7,1,5,7,-8,3,7]
x7=[-2,7,0,0,1,2,4,-7,-5,4,0,4,-3,2,-5,2,3,4,2,-3,0,-3,-1,1,4,8,1,-7]
y=[-8,11,22,-8,-8,-12,8,-16,-8,5,7,28,5,30,2,7,11,8,15,33,-6,-4,-26,36,3,39,5,1]
希望可以找到x1、x2、x3、x4、x5、x6、x7对Y的影响.好像说要用逐步回归分析法……求问怎么做……
郭敦顒回答：
N=|1_|2|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
y=[-8 |11|22|-8|-8|-12|8|-16|-8|5|7_|28|5_|30|2_|7_|11|8_|15|33|-6_|-4|-26|36|3_|39|5_|1_]
将y由小至大依次重排序,xn也相应依次重排序,这样可便于较直观地判断x与y之间的关联状况,x1与y大体上呈线性相关；x2、x3、x4与y则是非线性的,十分复杂,一时难以更精确判断,进一步做出回归分析困难重重.
n=|1_|2_|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
N=|23|8_|6_|1_|4_|5_|9|21|22|28|15|25|10|13|27|11|16|7_|18|2_|17|19|3_|12|14|20|24|26|
y=[-26|-16|-12|-8|-8|-8|-8|-6_|-4|1_]2_|3_|5_|5_|5_|7_|7_|8|8_|11|11|15|22|28|30|33|36|39|
n=| _1_| _2 _| _3_| _4_| _5_|6_| _7 _| _8_| _9_| _10 _|11| _12| _13| _14|
N=|23 _| _8_|6__| _1_| _4_| _5_| _9| _21| _22| _28 _| _15| _25| _10| _13|
y=[-26 _|-16 |-12 _|-8 _|-8 _|-8 _|-8 _|-6_ _|-4 _ _|1_ _]2_| _3_| _5_| _5 _|
x1=|-13|-7.2|-8.3|-6.1|1.9|-1.3|-3.8|-3.2|-1.2|-1.3|1.9|3.7| -6.8|1.9 _|
n =|15_|16_|17_|18_|19_|20_|21_|22_|23_|24_|25_|26_|27_|28_|
y=|_5_|_7_|_7_|_8_|_8_|_11_|11_|15_|22_|28_|30_|33_|36_|39_|
N=|27_|11_|16_|_7_|18_|_2_|17_|19_|_3_|12_|14_|20_|24_|26_|
x1=|3.3|3.7_|9.9|_14_|_4_|-0.2|7.7_|9.8_|7.3_|14.8|14,1|10_|10.3|18_|
x1=[-6.1,-0.2,7.3,1.9,-1.3,-8.3,14,-7.2,-3.8,-6.8,3.7,14.8,1.9,14.1,1.9,9.9,7.7,4,9.8,10,-3.2,-1.2,-13,10.3,3.7,18,3.3,-1.3]
n =|1_|2_|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
N=|23|8_|6_|1_|4_|5_|9|21|22|28|15|25|10|13|27|11|16|7_|18|2_|17|19|3_|12|14|20|24|26|
y=[-26|-16|-12|-8|-8|-8|-8|-6_|-4|1_]2_|3_|5_|5_|5_|7_|7_|8|8_|11|11|15|22|28|30|33|36|39|
x2=|-9|-2|-4|5 |-6|-1|-2|0 _|2 _|2| 0 |0 _|0_|2|-2 |6 _|2 |-2|-3|-1|1 _|6|9 _|2 _|0|2 _|7 _|3 _|
n =|1_|2_|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
N=|23|8_|6_|1_|4_|5_|9|21|22|28|15|25|10|13|27|11|16|7_|18|2_|17|19|3_|12|14|20|24|26|
y=[-26|-16|-12|-8|-8|-8|-8|-6_|-4|1_]2_|3_|5_|5_|5_|7_|7_|8|8_|11|11|15|22|28|30|33|36|39|
x3=|13|6|2 _|1_|-6|-1_|0|8 |-6|5 |12|1_|13|-7|11|-1|-11|2|11|14|-2|-11|-1|2_|10|15|1 _|2_ |
x4=-5|-7|-13|4|-3|3|13|-1|3|7|-7|8|7|-5|8|-3|13|-10|6|6_|0_|8_|14|15|38|13|29|3_|
N=|1_|2|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
y=[-8 |11|22|-8|-8|-12|8|-16|-8|5|7_|28|5_|30|2_|7_|11|8_|15|33|-6_|-4|-26|36|3_|39|5_|1_]
将y由小至大依次重排序,xn也相应依次重排序,这样可便于较直观地判断x与y之间的关联状况,x1与y大体上呈线性相关；x2、x3、x4与y则是非线性的,十分复杂,一时难以更精确判断,进一步做出回归分析困难重重.
n=|1_|2_|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
N=|23|8_|6_|1_|4_|5_|9|21|22|28|15|25|10|13|27|11|16|7_|18|2_|17|19|3_|12|14|20|24|26|
y=[-26|-16|-12|-8|-8|-8|-8|-6_|-4|1_]2_|3_|5_|5_|5_|7_|7_|8|8_|11|11|15|22|28|30|33|36|39|
n=| _1_| _2 _| _3_| _4_| _5_|6_| _7 _| _8_| _9_| _10 _|11| _12| _13| _14|
N=|23 _| _8_|6__| _1_| _4_| _5_| _9| _21| _22| _28 _| _15| _25| _10| _13|
y=[-26 _|-16 |-12 _|-8 _|-8 _|-8 _|-8 _|-6_ _|-4 _ _|1_ _]2_| _3_| _5_| _5 _|
x1=|-13|-7.2|-8.3|-6.1|1.9|-1.3|-3.8|-3.2|-1.2|-1.3|1.9|3.7| -6.8|1.9 _|
n =|15_|16_|17_|18_|19_|20_|21_|22_|23_|24_|25_|26_|27_|28_|
y=|_5_|_7_|_7_|_8_|_8_|_11_|11_|15_|22_|28_|30_|33_|36_|39_|
N=|27_|11_|16_|_7_|18_|_2_|17_|19_|_3_|12_|14_|20_|24_|26_|
x1=|3.3|3.7_|9.9|_14_|_4_|-0.2|7.7_|9.8_|7.3_|14.8|14,1|10_|10.3|18_|
x1=[-6.1,-0.2,7.3,1.9,-1.3,-8.3,14,-7.2,-3.8,-6.8,3.7,14.8,1.9,14.1,1.9,9.9,7.7,4,9.8,10,-3.2,-1.2,-13,10.3,3.7,18,3.3,-1.3]
n =|1_|2_|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
N=|23|8_|6_|1_|4_|5_|9|21|22|28|15|25|10|13|27|11|16|7_|18|2_|17|19|3_|12|14|20|24|26|
y=[-26|-16|-12|-8|-8|-8|-8|-6_|-4|1_]2_|3_|5_|5_|5_|7_|7_|8|8_|11|11|15|22|28|30|33|36|39|
x2=|-9|-2|-4|5 |-6|-1|-2|0 _|2 _|2| 0 |0 _|0_|2|-2 |6 _|2 |-2|-3|-1|1 _|6|9 _|2 _|0|2 _|7 _|3 _|
n =|1_|2_|3_|4_|5_|6_|7|8_|9_|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|
N=|23|8_|6_|1_|4_|5_|9|21|22|28|15|25|10|13|27|11|16|7_|18|2_|17|19|3_|12|14|20|24|26|
y=[-26|-16|-12|-8|-8|-8|-8|-6_|-4|1_]2_|3_|5_|5_|5_|7_|7_|8|8_|11|11|15|22|28|30|33|36|39|
x3=|13|6|2 _|1_|-6|-1_|0|8 |-6|5 |12|1_|13|-7|11|-1|-11|2|11|14|-2|-11|-1|2_|10|15|1 _|2_ |
x4=-5|-7|-13|4|-3|3|13|-1|3|7|-7|8|7|-5|8|-3|13|-10|6|6_|0_|8_|14|15|38|13|29|3_|