| 核心 | 实验主指标 |
|---|---|
| 护栏 | 防劣化指标 |
| 统计 | 样本量/MDE/显著性 |
分组对比
分组对比
SELECT grp, count(DISTINCT user_id) AS users,
avg(metric_val) AS avg_val
FROM ab_experiment_daily
WHERE exp_id = 'E2026' AND dt BETWEEN '2026-10-01' AND '2026-10-07'
GROUP BY grp;实验期间分批查看并提前决策（peeking）会放大假阳性：按计划节点评审。