Coefficient Std. err. z P>z [95% conf. interval]
season1 .085 .273 0.31 0.755 .45 .621
season2 -.410 .310 -1.32 0.186 1.01 .198
season3 .081 .259 0.31 0.753 .42 .589
season4 0 (omitted)
就大概显示出这种情况,用向后删除法的话该怎么取舍season4?