<prompt> Translate the following text to SwahiliOne possibility is that studies report different estimates of the single true relationship between a given pollutant and a health effect due to differences in study design, random chance, or other factors.  <response>: Uwezekano mmoja ni kwamba masomo ripoti makadirio tofauti ya uhusiano wa kweli kati ya uchafuzi fulani na athari ya afya kutokana na tofauti katika muundo wa utafiti, bahati mbaya, au sababu nyingine. 