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You observed northbound traffic for exactly 6 minutes and measured the speed of all 10 northbound...

You observed northbound traffic for exactly 6 minutes and measured the speed of all 10 northbound (one lane in each direction) vehicles. The speeds were: 48, 35, 47, 49, 39, 43, 52, 49, 37, and 48 mph. Estimate the headway (to the nearest foot) between the northbound vehicles

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