rú guǒ / bù tóng / dì qū / de / yàng běn / lái zì / bù tóng / zǒng tǐ / suí jī xiào yìng / kě yǐ / bāng zhù / mó xíng / gū jì / zhè zhǒng / zǔ jiān / biàn yì

如果不同地区的样本来自不同总体，随机效应可以帮助模型估计这种组间变异。

If samples from different regions come from different populations, random effects can help the model estimate this between-group variation.