Discussion:
The Iowa Department of Transportation is concerned with the use of cellphones while driving. It commissioned a survey of drivers to see what relationship there might be between use of cellphones and accidents. The survey yielded the following data:
Had an accident Did not have accident in the last year in the
Uses cell phone while driving 25 300
Does not use cell phone 50 400 while driving
What do you conclude from this data (use the ,05 significance level)?