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Updated: May 17, 2025

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低精度与高精度测量方法的功率比较E. 在低资源环境中饮用水中的大肠杆菌

Andrea Sosa-Moreno1, Gwenyth O Lee2, Zhenke Wu3

  • 1Department of Epidemiology, University of Michigan, 1415 Washington Heights, Ann Arbor 48109, Michigan, United States.

ACS ES&T water
|May 15, 2025
PubMed
概括

低精度的水质测试,如用于大肠杆菌的测试,需要更大的样本大小才能获得可靠的结果. 这突显了在资源有限的环境中,成本和统计能力之间的权衡.

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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When we take repeated measurements on the same or replicated samples, we will observe inconsistencies in the magnitude. These inconsistencies are called errors. To categorize and characterize these results and their errors, the researcher can use statistical analysis to determine the quality of the measurements and/or suitability of the methods.
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In any measurement, the precision of the measuring tool is an essential factor. An ordinary ruler, for example, can measure length to the closest millimeter; a caliper, on the other hand, can measure length to the nearest 0.01 mm. As a result, the caliper is a more precise measurement tool because it can measure extremely minute changes in length. The measurements will be more accurate if the measuring tool is more precise.
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