input week bsold shelfs /// Data from Hanke - Wichern Edition 9 page 50 # 12 /// Data from Hanke - Wichern Edition 8 page 48 /// Data from Edition 7 page 44 1 275 6.8 2 142 3.3 3 168 4.1 4 197 4.2 5 215 4.8 6 188 3.9 7 241 4.9 8 295 7.7 9 125 3.1 10 266 5.9 11 200 5.0 end label variable week "Week Data Collected " label variable bsold "Books Sold " label variable shelfs "Shelf Space " summarize corr regress bsold shelfs