1) Earthquakes can be broken into two classes based on the directions the earth moves when they fracture. The classes can be compared across time, for whether earthquakes occur in a given region in a small time period, and if they occur in the next small time period, and it can be added up across several time periods, below is a table for a region off Indonesia over a 30 year period Second time period, Second time period no Marginal Sums earthquake happens earthquake happens Earthquake happens earthquake happens Marginal sums 424 2900 3324 Is happening of an earthquake in one time period statistically independent of happening in another time period? Test at the .01 level (10 points)