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
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If you want to determine whether or not the coefficients of the independent variables are significant, the critical t value at α = .01 is

A) 2.080.
B) 2.831.
C) 2.518.
D) 2.807.