The following speed data was collected Using a radar gun on an arterial street. Speed Group (mph) Frequency 10 17 36 66 84 Estima te 16-20 a) time mean speed 2)-25 26-30 31-35 36-40 41-45 46-50 ら1-55 56-60 b) 85*peccentile speed c) Modal speed d) Pace 70 50 21

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