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

Table 7

Error between the result matrix of the second test and the actual situation.

	Good	Commonly	Qualified	Unqualified	Difference
Good	−0.031	1.56	−0.82	0.23	1.83
Commonly	0.82	0.01	1.212	0.60	1.82
Qualified	1.32	0.82	0.085	2.44	0.83
Unqualified	1.83	1.21	−0.67	0.047	0.82
Difference	0.60	0.61	1.42	0.26	0.068