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 .01 level of significance, the coefficient of x₃ 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.

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The Answer of 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 .01 level of significance, the coefficient of x₃ 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.

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