Sustainable Energy Research

Table 3 Weekly firewood consumption before and after biogas plant installation

From: Cost-benefit Analysis and Financial Viability of Household Biogas Plant Investment in South Ethiopia

Variable	Plant size	Category	Minimum	Maximum	Mean ± SD	t value	p value
Firewood (Kg)	6 m³	Before adoption	64	128	103.53 ± 37.50	9.135	0.000^a
	6 m³	After adoption	32	64	51.76 ± 15.21	9.135	0.000^a
	8 m³	Before adoption	96	128	107.29 ± 36.53	9.926	0.000^a
	8 m³	After adoption	32	64	52.39 ± 15.04	9.926	0.000^a

^aRepresents1% level of significance

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