<prompt> Translate the following text to SwahiliThe width of the NOEC-LOEC interval is a function of the dilution series, and differs greatly depending on whether a dilution factor of 0.3 or 0.5 is used in the test design.  <response>: Upana wa NOEC-LOEC ni kazi ya mfululizo wa dilution, na inatofautiana sana kulingana na kama sababu ya dilution ya 0.3 au 0.5 hutumiwa katika muundo wa mtihani. 