[Retracted] A Cluster Analysis Model for PhD Dissertation Quality Based on the Depth Algorithm

Table 2

Review opinion results2.

Evaluation indicators	Sample size	Minimum value	Maximum value	Mean	Standard deviation
Indicator 3: basic theory and expertise	1816	2.3	4.0	3.855	2242
Indicator 4: writing level	1816	2.4	4.0	3.621	2750
Overview:	1816	2.8	5.0	3.990	3386