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

Table 5

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

	Good	Commonly	Qualified	Unqualified	Difference
Good	0.025	0.78	1.32	1.27	1.21
Commonly	−0.31	0.01	−1.32	1.34	−0.004
Qualified	0.82	−0.31	0.13	0.78	1.21
Unqualified	0.26	0.82	0.60	−0.12	1.21
Difference	1.85	−0.31	0.11	−0.004	0.03