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2. An economist tests the hypothesis that GDP growth in a certain country can be explained by interest rates and inflation. Using some 30 observations, the analyst formulates the following regression equation: GDP growth = B o + B Interest + B Inflation 2 Regression estimates are as follows: Coefficient Standard error Intercept 0.10 0.5% Interest rates 0.20 0.05 Inflation 0.15 0.03 Is the coefficient for interest rates significant at 5%