Students who attend Anytown College pay either in-state Calculate the standard deviation of the sum or out-of-state tuition, depending on where they reside. S=1+0.
The amount, I spent on in-state tuition for a randomly
selected student has a mean of $2,523.75 and a standard Os = $227.69
deviation of $1,003.25. The amount, O, spent on out-of-
state tuition for a randomly selected student has a mean
Os = $1,301.25
of $3,825.00 and a standard deviation of $1,126,50.
✓ Os = $1,508.48
Suppose we randomly select one student who pays in-
state tuition and one student who pays out-of-state tuition. os = $6,348.75
We can consider I and to be independent random
variables.