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The following table shows the cumulative number of hospitalizations and deaths for each age group, due to H1N1 (swine flu) infections in the state of Illinois up to September 4, 2009.
Age	Hospitalized	Deaths
[0,5)	58		1
[5,25)	144		4
[25,50)	93		6
[50,65)	54		5
[65+)   16		1

A histogram of the ages of H1N1 hospitalized patients can be easily obtained from this table with the following lines of R code:
---------cut-here---------
b = c(0,5,25,50,65,100);f = c(58,144,93,54,16)
myhist = list(breaks=b,counts=f,density=100*f/sum(f)/diff(b),
  xname="Age in Years"); class(myhist) = "histogram" 
plot(myhist,main="Ages of H1N1 Hospitalizations",col="grey")
---------up-to-here-------

The percentage of hospitalizations with ages between 17 and 23 years of age (i.e. typical college student ages) is closest to:
  • 40%
  • 12%
  • 10%
  • 30%
  • 55%
  • *****
    calculator


    Carlos Rodriguez <carlos@math.albany.edu>
    This problem was contributed by a student. It is offered as it is with no warranty of any kind
    Last modified:Fri Sep 11 2009 15:21:39 GMT-0400 (Eastern Daylight Time)