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T-tests (Student's; I don't believe there is a "standard" t-test.) are not valid when comparing more than two groups. You'd have to do an analysis of variance (ANOVA) followed by a relavent post hoc test, assuming you get a main effect of vehicle. I prefer the Scheffe' as it is very stringent.
Of course, the point is moot, get the ferrari and you'd get looks from chicks (assuming they know something about cars or have functiong ears) and from guys (wish it were me in that car).
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