Unformatted text preview: are comparing the relative performance of two systems. Performance results are easy to compare when they are stated in relation to the performance of a common machine used only as a reference. We say that the systems under evaluation are normalized to the reference machine when we take the ratio of the run time of a program on the reference machine to the run time of the same program on the system being evaluated. To find the geometric mean of the normalized ratios we take the n th root of the product of the n ratios. The geometric means for System A and System C normalized to System B are calculated as follows: Geometric Mean for A = (100/50 ± 400/200 ± 500/250 ± 800/400 ± 4100/5000)/5 ± 1.6733 Geometric Mean for C = (100/500 ± 400/600 ± 500/500 ± 800/800 ± 4100/3500)/5 ± 0.6898...
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 Summer '14
 tylor
 Mean, Weighted mean

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