[Retracted] An Empirical Analysis of Piano Performance Skill Evaluation Based on Big Data

Table 1

Objective matrix.

	Good	Commonly	Qualified	Unqualified	Difference
Good	1	0	0	0	0
Commonly	0	1	0	0	0
Qualified	0	0	1	0	0
Unqualified	0	0	0	0	1
Difference	0	0	0	1	0