Stonebuilt Concrete produces a specialty cement used in construction of roads. Stonebuilt is a price-setting firm and estimates the demand for its cement by the state department of transportation using a demand function in the nonlinear form: Q = a pb Mf pdR where Q= yards of cement demanded monthly, P= the price of Stonebuilt's cement per yard, M= state tax revenues per capita, and PR = the price of asphalt per yard. The manager at Stonebuilt transforms the nonlinear relation into a linear relation for estimation. The estimation results are presented below: DEPENDENT VARIABLE: LNQ R-SQUARE OBSERVATIONS: 64 F-RATIO 84.872 P-VALUE ON F 0.0001 0.8093 STANDARD PARAMETER ESTIMATE VARIABLE ERROR T-RATIO P-VALUE INTERCEPT 8.20 4.01 2.04 0.0461 -2.16 0.0357 0.0014 0.0439 LNP -3.54 064287 1.64 0.19 038 LNM 3.38 LNPR 0.7854 2.07 If the price of asphalt (PR) decreases 15%, the estimated quantity of cement demanded will: Multiple Choice increase 5.2%. Increase 11.8%. increase 118%. decrease 11.8%. decrease 5.2%.

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