In a multiple regression equation two independent variables are considered, and the sample size is 29. The regression coefficients and the standard errors are as follows:

b2 = 2.576

b2 = -0.630

sb1 = 0.42

sb2 = 0.85

Conduct a test of hypothesis to determine whether either independent variable has a coefficient equal to zero. Would you consider deleting either variable from the regression equation? Use the 0.05 significance level. (Round the final answers to 3 decimal places. Negative answer should be indicated by a minus sign.)

H₀: ₁ = 0 H₀: ₂ = 0

H₁: ₁ 0 H₁: ₂ 0

H₀ is rejected if t < -2.056 or t > 2.056.