小弟再用SPSS做课程论文时 用逐步回归分析 键入变量后出现No variables were entered into the equation. 即 没有变量进入方程 请问怎么解决
数据如下
羊号 | 性别 | 年龄 | 产绒量 | 体重 | 体高 | 体长 | 胸围 | 管围 |
70030 | 0 | 2 | 640 | 70 | 60 | 70 | 88 | 8 |
79033 | 0 | 3 | 740 | 37.5 | 60 | 74 | 112 | 8 |
710246 | 0 | 1 | 765 | 30 | 59 | 72 | 80 | 7 |
710247 | 0 | 1 | 725 | 32 | 56 | 61 | 85 | 7.5 |
710259 | 0 | 1 | 670 | 30 | 55 | 63 | 73 | 8 |
710563 | 0 | 1 | 700 | 26 | 58 | 69 | 75 | 7 |
710565 | 0 | 1 | 750 | 27 | 57 | 64 | 70 | 7 |
710567 | 0 | 1 | 650 | 26 | 54 | 63 | 73 | 7 |
710596 | 0 | 1 | 550 | 29 | 59 | 63 | 78 | 7 |
710659 | 0 | 1 | 700 | 28 | 60 | 72 | 82 | 8 |
710673 | 0 | 1 | 710 | 48 | 58 | 64 | 72 | 7 |
730511 | 1 | 1 | 750 | 30 | 56 | 61 | 75 | 8 |
760514 | 0 | 1 | 750 | 39 | 58 | 62 | 73 | 7 |
791053 | 0 | 3 | 735 | 46 | 64 | 73 | 92 | 8.5 |