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77% of the participants aged 50 and up indicated that maintenance costs are worse for HEVs.
77% of the participants aged 50 and up indicated that maintenance costs are worse for HEVs. An association between age and participant perception of how HEVs are powered was also found using a chi-squared test. Figure 3 shows 82% of the participants aged 20-50 and 50% aged 50 and up correctly indicated that HEVs are powered by an internal combustion engine with a p-value of .05. Figure 3: How Are HEVs Powered? Figure 4 shows 57% indicated that HEVs need to be plugged in overnight for recharging and 34% indicated that nothing extra (compared to CVs) needs to be done to recharge the batteries for the electric motor. Figure 4: How Are The Batteries Charged?