During the period 19901998 there were 46 Atlantic hurricanes, of which 19 struck the United States. During

Question:

During the period 1990–1998 there were 46 Atlantic hurricanes, of which 19 struck the United States. During the period 199922006 there were 70 hurricanes, of which 45 struck the United States.
State the hypotheses to test whether the percentage of hurricanes that strike the United States is increasing. Calculate the test statistic. State the critical value at α = .01. What is your conclusion? Can normality of p1 – p2 be assumed?