In a Regression Analysis of a First-Order Model Involving 3

Multiple Choice

In a regression analysis of a first-order model involving 3 predictor variables and 25 observations, the following estimated regression equation was developed. ​ = 12 - 18x₁ + 4x₂ + 15x₃
​
Also, the following standard errors and the sum of squares were obtained.
S_b1 = 3
S_b2 = 6
S_b3= 7
SST = 4900
SSE = 1296
​
At the 1% level, the coefficient of x₂

A) is significant.
B) is not found to be significant.
C) cannot be tested, because not enough information is provided.
D) should be estimated again, because it is incorrect in the above equation.