Residual Compressive Strength of High-Strength Concrete Exposed to Elevated Temperatures

Table 6

Error estimates for different predictive models.

Parameter for error estimate	Normalized concrete strength (R =  )
	Regression Model 1	Regression Model 2	Regression Model 3	Regression Model 4
Mean percent error (MPE)	6.70	5.88	6.71	5.66
Mean absolute percent error (MAPE)	20.04	26.68	19.95	28.20
Root mean square error (RMSE)	0.14	0.15	0.14	0.15
Percent data for error within 15%	54	45	55	46
Percentage error enveloping 80% data	31.8	34.4	30.8	38.4