extreme and mean ratio

例句：

1. 1. The company's performance has been measured against its own extreme and mean ratio.
   该公司的业绩与其自身的极端与平均比率进行了比较。
2. 2. The researcher found that the extreme and mean ratio of the population was significantly different from the national average.
   研究者发现，人口的极端与平均比率与全国平均水平有显著差异。
3. 3.The manager explained that the extreme and mean ratio of the production process had a significant impact on the quality of the final product.
   经理解释说，生产过程的极端与平均比率对最终产品的质量有重大影响。