查有实据 meaning in English

investigation reveals valid evidence

The survey compared the quality of academic staff and their academic achievements , plus ratings by employers , etc . the survey evaluated the academic achievements of the economics departments of seven local universities against a set of stringent criteria
是次调查非常严谨，根据查有实据的数据分析而得，评比范围包括师资阵容研究表现及雇主对毕业生的评价等，客观而全面。