During the period 1990–1998 there were 46 Atlantic hurricanes, of which 19 struck the United States. During the period 1999–2006 there were 70 hurricanes, of which 45 struck the United States. (a)...

During the period 1990–1998 there were 46 Atlantic hurricanes, of which 19 struck the United States. During the period 1999–2006 there were 70 hurricanes, of which 45 struck the United States. (a) Does this evidence convince you that the percentage of hurricanes that strike the United States is increasing, at α = .01? (b) Can normality be assumed? (Data are from The New York Times, August 27, 2006, p. 2WK.)