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Case Analysis An automatic device is used to count the volume of traffic at a busy intersection. The device records the time a car arrives at the intersection on a continuous time scale, starting from zero. The following table provides the (cumulative) arrival time (in minutes) for the first 60 cars. Use Excel to construct a suitable histogram, and then test the hypothesis that the interaarival time is drawn from an exponential distribution. Use a 95% confidence level. Arrival Arrival Arrival Arrival 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Arrival time (min) 5.2 6.7 9.1 12.5 18.9 22.6 27.4 29.9 35.4 35.7 44.4 47.1 47.5 49.7 67.1 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Arrival time (min) 67.6 69.3 78.6 86.6 91.3 97.2 97.9 111.5 116.7 117.3 118.2 124.1 127.4 127.6 127.8 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Arrival time (min) 132.7 142.3 145.2 154.3 155.6 166.2 169.2 169.5 172.4 175.3 180.1 188.8 201.2 218.4 219.9 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Arrival time (min) 227.8 233.5 239.8 243.6 250.5 255.8 256.5 256.9 270.3 275.1 277.1 278.1 283.6 299.8 300.0