Hurricanes The histogram shows the distribution of hurricanes that have hit the U.S. mainland by category, with 1 the weakest level and 5 the strongest. (Source: Weather Research Center) Hurricanes That Have Hit the U.S. P(x) Tacoma Narrows Bridge: Car Occupancy P(x) 0.392 0.40 0.35 0.30 0.25 0.20 0.15 0.265 70.2 0.269 0.6 0.555 0.5- Probability 0.4- 0.298 0.3 0.2- 0.047 0.10 0.064 0.1 0.05 0.011 0.0760.014 0.01 6 or T 1 2 3 4 5 1 2 3 more Category Occupants FIGURE FOR EXERCISE 37 FIGURE FOR EXERCISE 38