Covariate1 | Estimate | Model-based tests2 | Robust tests1,2 | ||
SE | p | SE | p | ||
group | −0.70 | 0.25 | 0.006 | 0.28 | 0.013 |
number | 0.59 | 0.19 | 0.002 | 0.21 | 0.006 |
size | 0.01 | 0.12 | 0.907 | 0.12 | 0.911 |