Why do statistics graduate students need to fill in their immediate family members when reviewing data?

It's part of your social relationship.

The "Political Examination Form" is an office document in which candidates' comprehensive performance, candidates' individuals, immediate family members and major social relations are inspected by their units, and the candidates give the final political examination conclusion. Must be taken seriously, the examinee's own verification content must be consistent with the notes signed by the person in charge of political examination, and there must be no traces of smearing or rewriting.

The content of the Political Examination Form must be logical and rigorous. Logically speaking, if the content is not rigorous enough, it will lead to the lack of comprehensiveness, completeness and authenticity of the verification content of the candidate's unit, and it is difficult for the enrollment unit to make the most accurate political examination conclusion or even unqualified conclusion according to the above content, thus affecting the enrollment procedure and retest results.