Another variable in this AHA database is Service, which is essentially the type of hospital. In the database under Service, there are 15 different types of hospitals coded from 1 to 15. As an example, code 3 represents orthopedic hospitals. Using the database and techniques presented in this chapter, test to determine if Service (type of hospital) is independent of Region. (Round answer to 3 decimal places, e.g. 15.251.) American Hospital Association database Find the Chi-square value and check whether Service is independent of Region or not.