MCI said where the survey sample was not representative of the resident population by gender, age, or race, it was weighted accordingly to ensure representativeness.

Source: https://www.channelnewsasia.com/singapore/singapore-residents-positive-overall-quality-life-post-covid-19-pandemic-government-survey-3357876?cid=cna_flip_070214

Since the state department is uncertain uncertain about the representativeness of the first sample the waters will be retested.

Source: https://bigislandnow.com/2023/01/25/high-bacteria-levels-detected-at-east-hawaii-beach/