Table 7

Mann–Whitney U test result for age group variables (below 45 vs 45 and over)

Means rank (n = 58)
Mann–Whitney UZAsymp. Sig. (2-tailed)Below 45 (n = 24)45 and over (n = 34)Interpretation
Benefit item showing significant result
03BN. Off-grid renewable energy systems (solar, wind, battery storage)309.0−1.8220.06825.3832.41Borderline significance (p < 0.05)
07BN. Structural resilience against extreme climate conditions (bushfires, drought, flooding)299.0−2.3720.01824.9632.71Significant difference
Barrier item showing significant result
01BR. The upfront cost of building an Earthship home makes it unaffordable for most Australians290.0–1.9370.05334.4226.03Borderline significance (p < 0.05)
10BR. Constructing Earthships is a labor- intensive process requiring specialized skills.277.5–2.1370.03334.9425.66Significant difference

Note(s): Grouping Variable: Age Group (below 45 and over 45)

Source(s): Authors' own work

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