The information below shows the cost for a year of college in public and private colleges in 1980-81 and 2007-08. What is the geometric mean annual increase for the period for the two types of colleges? Compare the rates of increase.
Type of College
|
1980-81
|
2007-08
|
Public
|
$2,550
|
$6,966
|
Private
|
5,594
|
13,424
|