Q. Qd = 5,000 - 15P + 50A + 3Px - 4I,
(2, 117) (2.7) (15) (2) (3)

where Qd = Quantity Demanded, P = Good Cost, A = Advertising Expenditures, Px = Cost of a Competitive Good, A = Advertising Expenditures, I = Average Monthly Income and Standard Errors of Regression Coefficients are shown in Parentheses.

Estimate t-statistics for each variable and elucidate Illustrate what inferences can be drawn from m. If R2 of this equation is 0.25, illustrate what inference can be drawn from it.