*
* Example 2.12 from page 52
*
open data meap93.raw
data(format=free,org=columns) 1 408 lnchprg enroll staff expend salary benefits $
 droprate gradrate math10 sci11 totcomp ltotcomp lexpend lenroll lstaff bensal lsalary
*
linreg math10
# constant lnchprg