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

Table 8

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

	Good	Commonly	Qualified	Unqualified	Difference
Good	−0.02	0.89	−0.31	0.78	1.31
Commonly	0.82	−0.03	−0.19	0.82	1.14
Qualified	1.38	0.82	0.09	−0.31	1.21
Unqualified	−0.31	0.23	1.83	0.012	0.82
Difference	0.82	0.31	0.912	0.60	−0.119