<prompt> Translate the following text to SwahiliIt is not possible to place confidence limits on the NOEC and LOEC derived from a given test, and it is difficult to quantify the precision of the NOEC-LOEC endpoints between tests.  <response>: Ni vigumu kuweka mipaka ya uaminifu juu ya NOEC na LOEC inayotokana na mtihani fulani, na ni vigumu kuhesabu usahihi wa mwisho wa NOEC na LOEC kati ya vipimo. 