/*------------------------------------------------------------------- 
ECO520 BA TOOLS II
Exmple: Regression Analysis
Topic:  Butler Trucking Company 
Butler Trucking Company’s business involves deliveries throughout its
local area and that the managers want to estimate the total daily travel
time for their drivers in order to develop better work schedules for the 
company’s drivers.

Source: Camm, Jeffrey D., James Cochran, Michael Fry. Essentials of Business 
Analytics,  2nd Edition. Cengage Learning, 20160219.  
--------------------------------------------------------------------*/ 

filename webdat url "http://bigblue.depaul.edu/jlee141/econdata/eco520/butler.csv" ;

/* Import Chicago Community data*/
PROC IMPORT OUT= traveltime 
            DATAFILE= webdat 
            DBMS=CSV REPLACE;
     GETNAMES=YES;
     DATAROW=2; 
RUN;
proc contents ; run ;

proc reg data=traveltime ;
  model time = miles     ;
  model time = miles deliveries ;
  model time = miles deliveries highway / vif ;

run ;
quit ;