The district sales manager for a major supermarket chain is studying sales. He believes sales depend primarily on three factors: population density in thousands (X1), advertising budget in thousands of dollars (X2), and number of competitors in the region (X3). After careful sampling and investigation he comes up with the following regression equation where sales are in thousands of dollars: Y' = 1700 + 14.2X1 + 0.86X2 − 23X3 It is rumored that 2 of the competing chains are closing store in the area. What increase in mean sales (to the nearest thousand dollars) can the sales manager expect for a store in a community with a population of 6100, an advertising budget of $2200 if these two competitors leave the market? Multiple Choice $17 000 $23 000 $46 000 $57 000 $19 496

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