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

From: Factors influencing the adoption of biogas digesters in rural Ethiopia

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