Almost every year, there is some incidence of volcanic activity on the island of japan. in 2005 there were 5 volcaninc episodes, defined as either eruptions or sizable seismic activity. suppose the expected number of episodes is 2.4 per year. let x be the number of episodes in the 2-year period 2008-2009.
(a) what model might you use to model x? why ? justify the appropriateness of this model for this problem. provide the parameter values for the model chosen.
(b) using the model calculate the probability that there will be no episodes in this period?
(c) using the model, calculate the probability that there are more than three episodes in this period.