The following are results from a regression model analysis:

The numbers in parentheses under the coefficients are the estimated coefficient standard errors.
a. Compute two-sided 95% confidence intervals for the three regression slope coefficients.
b. For each of the slope coefficients test the hypothesis H₀ : β_j = 0

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ý = -3.54 + 7.4x₁ + 3.2x2 + 10.1x3 (4.2) (0.7) (13.2) R2 = 0.78 = 41 n =