Create the SALES data set. SALES contains weekly information on the sales of refrigerators and stoves by two sales representatives.
data sales; input Month Week Seller $ Icebox Stove; datalines; 1 1 Kreitz 3450.94 1312.61 1 1 LeGrange 2520.04 728.13 1 2 Kreitz 3240.67 222.35 1 2 LeGrange 2675.42 184.24 1 3 Kreitz 3160.45 2263.33 1 3 LeGrange 2805.35 267.35 1 4 Kreitz 3400.24 1787.45 1 4 LeGrange 2870.61 274.51 2 1 Kreitz 3550.43 2910.37 2 1 LeGrange 2730.09 397.98 2 2 Kreitz 3385.74 819.69 2 2 LeGrange 2670.93 2242.24 ;