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

Table 6

Error between the result matrix and the actual situation for the fourth test.

	Good	Commonly	Qualified	Unqualified	Difference
Good	0.025	−0.19	1.01	0.82	0.83
Commonly	0.56	0.023	0.60	1.83	−0.42
Qualified	0.82	−1.32	0.024	−0.823	1.831
Unqualified	−0.004	0.82	−0.82	0.012	-0.312
Difference	−0.002	1.31	0.32	0.60	0.033