|Null_value |   N|         sval_est|          sval_ci|
|:----------|---:|----------------:|----------------:|
|0.00       | 291| 29.6005190064406| 8.31106698173349|
|0.01       | 291| 60.6567068188973| 10.4592870926312|
|0.05       | 291|     Not possible|     Not possible|
