The demand function for good X is Qdx = a + bPx + cM + e, where Px is the price of good X and M is income. Least squares regression reveals that â = 5.25, ^b = -1.36, c = -0.14, oâ = 6.19, o^b = 0.56, oc = 0.05. The R-squared is 0.24.
a. Compute the t-statistic for each of the estimated coefficients.
b. Determine which (if any) of the estimated coefficients are statistically different from zero.
c. Explain, in plain words, what the R-square in this regression indicates.