In the Last Decade article on airline safety, the authors consider the effect of new airlines (see p. 15) on the average risk of all airlines. This...

In the Last Decade article on airline safety, the authors consider the effect of new airlines (see p. 15) on the average risk of all airlines. This problem was solved in lecture. The null hypothesis was that both old airlines and new airlines had the same risk, whereas the alternative is that new airlines are more prone to have disasters. Consider the data: Number of Flights and Disasters 1979-86