Cut and paste the following code into R.
barplot(c(1,4,3,0.5),c(20,20,30,30),space=0, col=c("white","gray","white","white"), main="Histogram of Exam Scores", xlab="Score Points") axis(1)Look at the generated picture. If there were 150 students taking the Exam, how many scored between 20 and 40 points? |

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:Wed Sep 02 2009 16:03:30 GMT-0400 (Eastern Daylight Time)