Originally Posted by
Wogsterca
Were all conditions other then tire width normalized? Were tire widths measured or were they values printed/embossed on the tire. Were multiple runs taken and averaged or was it a single run? If multiple runs were they always done in the same order, or was the order changed?
Yes.
Actual tire width measured with calipers.
Multiple runs, and repeated on several different days. The order of runs was randomized. Results were found to be highly repeatable, including later results produced in subsequent (months to years later) tests.
A statistical analysis (including ANOVA) was performed on the results. The ratio of explained to unexplained variance was 151 to 1 and overall confidence was 99.99%.