5.13

5.13 Major Hurriacanes, The Atlantic Hurrican Data base extends back to 1851 recording among other things the number of may or hurricanes Striking the U.S Atlantic and Gulf coast per year Amajor hurricane is a hurricane measuring at least a category s or the Saffir-simpion hurricane hurricane wind scale . The following table provides a probability distribution for the number of major hurricane Y, for a randomly year between 18513 2012 Y PC = YLY PLY = Y ) 0 . 185 5 0. 056 0 . 29 6 0: 037 0. 26 6 7 0 . 012 3 0 . 093 8 0 . 004 4 0 . 0491 a, at least one major hurricane B. exactly three major hurricanes c. Between 2 major hurricanes, inclusive use the speacial addition rule and probability distribution to determine Do p ( Y z 1 ). ( . P L Y = 3) . 2 F . p ( 2