TITLE 'GEOG 301: MULTIVARIATE LINEAR REGRESSION'. 
DATA LIST FIXED /SHOPID 1-2 SALES 4-5 PRICE 7-9 PARKING 11-13 CHEQUES 15-17. 
VARIABLE LABELS SHOPID 'GROCERY STORE IDENTIFICATION NUMBER' 
SALES 'VOLUME OF SALES -- $000S PER YEAR' 
PRICE 'PRICE OF AVERAGE ORDER' 
PARKING 'NUMBER OF PARKING STALLS' 
CHEQUES 'NUMBER OF CUSTOMERS WITH CHEQUE-CASHING CARDS'. 
BEGIN DATA. 
01 54 098 297 247 
02 59 096 388 299 
03 31 102 205 187 
04 33 102 257 264 
05 66 095 352 263 
06 45 100 290 256 
07 13 108 103 125 
08 66 094 371 299 
09 27 103 214 187 
10 44 100 256 244 
11 10 110 138 152 
12 81 092 417 320 
13 83 092 459 317 
14 72 095 399 311 
15 44 105 263 218 
END DATA.
GRAPH/SCATTERPLOT(BIVAR)=sales WITH shopid/MISSING=LISTWISE
/TITLE='SALES AS A FUNCTION OF PRICE'. 
GRAPH/SCATTERPLOT(BIVAR)=sales WITH parking/MISSING=LISTWISE
/TITLE='SALES AS A FUNCTION OF PARKING AVAILABILITY'. 
GRAPH/SCATTERPLOT(BIVAR)=sales WITH CHEQUES/MISSING=LISTWISE
/TITLE='SALES AS A FUNCTION OF CUSTOMERS WITH CHEQUE CARDS'.
REGRESSION /VARIABLES SALES PRICE PARKING CHEQUES 
/CRITERIA = DEFAULTS 
/DESCRIPTIVES MEAN STDDEV VARIANCE CORR SIG
/STATISTICS=R CHA COLLIN OUTS TOL COEFF 
/DEPENDENT SALES 
/METHOD ENTER 
/PARTIALPLOT
/RESIDUALS. 
REGRESSION /VARIABLES SALES PRICE PARKING CHEQUES 
/CRITERIA = DEFAULTS 
/DESCRIPTIVES MEAN STDDEV VARIANCE CORR SIG 
/STATISTICS=R CHA COLLIN OUTS TOL COEFF 
/DEPENDENT SALES 
/METHOD STEPWISE
/SCATTERPLOT=(*SRESID,*PRED) 
/RESIDUALS.