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    • Question

      A regression equation from an Indian bank: Ŷ = 2.5 +

      0.8X₁ − 0.3X₂. p-values: α̂: 0.03, β̂₁: 0.02, β̂₂: 0.08. At 5% significance level, which is correct?
      A All three coefficients are statistically significant; model fully reliable Correct Answer Incorrect Answer
      B Intercept and β₁ are significant; β₂ is NOT significant at 5% — current account deficit does not significantly explain exchange rate stability in this model Correct Answer Incorrect Answer
      C β₂ is most important since it has the largest economic impact regardless of p-value Correct Answer Incorrect Answer
      D Since β₂ is insignificant, the model must be re-estimated dropping X₂ without any consequences Correct Answer Incorrect Answer

      Solution

      We cannot confidently reject H₀: β₂ = 0. Option (C) confuses economic significance with statistical significance. Option (D) is risky — dropping a relevant variable causes omitted variable bias.

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