Consolidate two operations into one

Author: MattFisher

src/inspect_evals/worldsense/_utils.py

@@ -50,9 +50,10 @@ def preprocess_scores(
 
     # Calculate weighted values and biases
     score_df["weight"] = score_df["answer"].map(weight_mapping).astype(float)
-    score_df["bias"] = score_df["answer"].map(bias_mapping).astype(float)
+    score_df["bias"] = (
+        score_df["answer"].map(bias_mapping).astype(float) * score_df["weight"]
+    )
     score_df["value"] = score_df["value"].astype(float) * score_df["weight"]
-    score_df["bias"] *= score_df["weight"]
 
     # Group and normalize
     grouped_scores = (