5042机器学习中等数值题short

Recover the Missing Fold Gap 2

题目

A 5-fold cross-validation comparison records four paired score differences (model A minus model B): [0.05, 0.02, 0.04, -0.01]. The desk report says the overall mean fold difference across all 5 folds was 0.026. What was the missing fifth-fold difference?

解题计时

0:00

提交作答时记录，用于后续平均用时统计。

你的答案

数值

支持题库 schema 允许的整数、小数、分数或四则表达式。