Exhibit 13-9
in a Regression Analysis Involving 25 Observations, the Following

Multiple Choice

Exhibit 13-9
In a regression analysis involving 25 observations, the following estimated regression equation was developed.
$\hat { Y }$ =10 - 18X1+3X2+14X3
Also, the following standard errors and the sum of squares were obtained.
Sb₁ = 3 Sb2 = 6 Sb3 = 7
SST = 4,800 SSE = 1,296
-Refer to Exhibit 13-9. The coefficient of X3

A) is significant
B) is not significant
C) can not be tested, because not enough information is provided
D) None of these alternatives is correct.