The filter factors calculated based on the available quantile statistics are not exact, but the estimate error is below 5%, even when only 20 values are collected.

根据已有的分位数统计信息计算出来的过滤因子不是很精确，但即使只收集20个值，其误差仍然低于5%。

youdao

But deciding to relocate based on statistics is not advisable.

但是根据这些统计数据去搬迁并非明智之举。

youdao

If current statistics are not available, the optimizer may choose an inefficient access plan based on inaccurate default statistics.

如果无法获得当前的统计数据，优化器就可能会基于不准确的默认统计数据选择低效的访问计划。

youdao

Fiercely secular, France does not collect official statistics based on religion.

ECONOMIST: Fears that terrorism is breeding in French prisons

The statistics are based on officers declaring themselves as disabled or not.

BBC: Doubts affect inconsistent police disability statistics