Factors influencing the adoption of biogas digesters in rural Ethiopia

Table 5 Correlation results of the four energy choices using multivariate probit model

Variable correlations	Coefficients	Standard error	Z	P value
Charcoal and firewood	0.274	0.139	1.97	0.049**
Biogas and firewood	0.332	0.135	2.45	0.014**
Dried dung and charcoal	−0.469	0.181	−2.59	0.010***
Biogas and charcoal	0.329	0.107	3.06	0.002***
Dried dung and charcoal	0.017	0.139	0.12	0.903
Dried dung and biogas	−0.237	0.143	−1.67	0.096

Likelihood ratio test of rho21 = rho31 = rho41 = rho32 = rho42 = rho43 = 0: chi²(6) = 23.30 Prob > chi² = 0.0000
Significance level: ***1% and **5%

ISSN: 2192-0567