用EVIEWS分析后通不过T检验，又不能去掉参数，请问详细应该怎么做。比如：
obs        X1            X2            X3         X4               X5         Y
0 8.120000 1.100000 6.670000 0.150000 12.42000 24.56000
1 8.220000 1.020000 1.460000 0.620000 12.49000 25.32000
2 10.26000 1.260000 1.400000 0.300000 17.14000 27.72000
3 18.70000 0.520000 1.710000 0.780000 13.02000 36.93000
4 12.01000 0.570000 1.580000 2.020000 18.79000 29.49000
5 13.18000 1.020000 1.580000 1.750000 18.99000 26.73000
6 12.66000 1.900000 5.140000 0.520000 19.93000 17.42000
7 17.92000 1.460000 1.310000 0.560000 21.78000 20.80000
8 11.21000 2.250000 22.09000 1.020000 16.89000 11.25000
9 16.81000 0.490000 1.660000 1.820000 29.78000 35.78000
用公式  ls log(y) c log(x1) log(x2) log(x3) log(x4) log(x5)
他们应为负相关性，又不能去掉参数，应该怎么做。谢谢。