# UTFANSWF v21 — Second Operator Test

## Second Operator

| Quantity | Value |
|---|---:|
| b2 (SN pivot) | 2.450746 |

## Residual transformation

| Node | Before | After |
|---|---:|---:|
| r_ell_A | 3.142651 | 0.691904 |
| r_H_BAO | 0.447459 | -2.003288 |
| r_D_M_BAO | 0.000000 | 0.000000 |
| r_SN | -2.450746 | 0.000000 |
| r_SH0ES | -4.154173 | -1.703426 |

## Metrics

| RSS before | 5.774061 |
| RSS after | 2.719109 |
| RSS improvement | 3.054952 |
| chi2 improvement | 25.946229 |

## Tests

- second_anchor_is_SN: True
- SN_neutralized: True
- sign_structure_preserved: False
- rss_improves: True
- rss_improvement_meaningful: True
- chi2_improves: True

Score: 5/6
Verdict: second_operator_partial
