<prompt> Translate the following text to SwahiliThere are several issues to consider when evaluating study quality, including but not limited to 1 whether the sample estimates of WTP are representative of the population WTP; 2 whether the good to be valued is comprehended and accepted by the respondent; 3 whether the WTP elicitation format is designed to minimize strategic responses; 4 whether WTP is sensitive to respondent familiarity with the good, to the size of the change in the good, and to income; 5 whether the estimates of WTP are broadly consistent with other estimates of WTP for similar goods; and 6 the extent to which WTP responses are consistent with established economic principles.  <response>: Kuna masuala kadhaa ya kuzingatia wakati wa kutathmini ubora wa utafiti, ikiwa ni pamoja na lakini si mdogo kwa 1 kama sampuli makadirio ya WTP ni mwakilishi wa idadi ya WTP; 2 kama bidhaa ya kuwa na thamani ni kuelewa na kukubaliwa na respondent; 3 kama WTP kuchochea muundo ni iliyoundwa kupunguza majibu ya kimkakati; 4 kama WTP ni nyeti kwa respondent ukoo na bidhaa, kwa ukubwa wa mabadiliko katika bidhaa, na mapato; 5 kama makadirio ya WTP ni kwa ujumla sambamba na makadirio mengine ya WTP kwa bidhaa sawa. 