International Scholarly Research Notices

Research Article

Predictive Modelling of Wellhead Corrosion due to Operating Conditions: A Field Data Approach

Table 5

Summary of parameter estimate.


Variable	Coefficient	Standard error	value	-test	Lower 95%	Upper 95%

	0.0038	0.0062	0.6098	0.5475	−0.009	0.0165
β ₄₂	0.997	0.386	2.585	0.016	0.2028	1.7927
β ₄₃	0.2379	0.1085	2.1922	0.0379	0.0144	0.4614
β ₄₄	0.0597	0.0745	0.8018	0.4302	−0.0937	0.2132
	−0.4508	0.6738	−0.669	0.5097	−1.8386	0.937
β ₂₁	0.0041	0.00613	0.668308	0.509827	−0.0085	0.016697
β ₂₂	0.948	0.378337	2.505766	0.01881	0.170341	1.725707
β ₂₃	0.2323	0.107545	2.160294	0.040147	0.011267	0.453389
β ₃₁	0.003196	0.005979	0.534545	0.597507	−0.00909	0.015486
β ₃₂	0.8196	0.360991	2.270454	0.031701	0.077586	1.561642
β ₃₃	1.3327	0.520421	2.560891	0.016593	0.263001	2.402483
α ₃₁	−0.0261	0.360199	−0.07247	0.942781	−0.76651	0.714296
α ₁₁	0.0701	0.393384	0.17819	0.859904	−0.73706	0.877254
β ₁₁	0.0051	0.006513	0.788925	0.437029	−0.00822	0.018501
β ₁₂	0.7973	0.396294	2.011877	0.05431	−0.01583	1.610425
α ₂₁	−0.0009	0.370577	−0.00245	0.998066	−0.76264	0.760825