This describes the percentage of the variability in effect estimates that is due to heterogeneity rather than sampling error (chance).

这个指标描述了由异质性而非抽样误差引起效应变异的百分比。

youdao

Advantages Event sampling Limits the behaviors observed, thus reducing the chance that the behavior of interest will be missed.

事件取样：限制行为观测（的数量），因而减少感兴趣行为被忽略的可能性。

youdao

If it used these sampling methods, the Census Bureau says, there is a 90% chance that its estimate of America's population would be within 0.1% of the true number.

ECONOMIST: Statistics