Prediction Methods for Routine Maintenance Costs of a Reinforced Concrete Beam Bridge Based on Panel Data

Table 6

Model parameter estimation and significance test.

Items	Parameters	Estimated value
Replacement of expansion joints		429.58	0.0022
		0.54	0.0002
Repair of expansion joints concrete		40.35	0.0006
		0.63	<0.0001
Maintenance of bridge steel handrails		756.45	0.0001
		0.63	<0.0001

is means of a sequence of samples; is the coefficient of the autoregressive parameter term; is significance of the t-test for parameter estimation.