R help - Oct 2010 - clinical data analysis

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
 


      
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