I have two sets of data national wide: total patient number=500,000, 8400 died, mortality rate=1.7% Hospital1: total patient number=230, 6 died, mortality rate=2.6% Is the mortality rate of hospital1 different from mortality rate of nationl wide? Which function or package should I use to solve this kind of problem? I am new to R (3 month) Thank you [[alternative HTML version deleted]]