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| Williams proceeds to test the hypothesis that none of the independent variables has significant explanatory power. He concludes that, at a 5% level of significance: A. none of the independent variables has explanatory power, because the calculated F-statistic does not exceed its critical value. B. all of the independent variables have explanatory power, because the calculated F-statistic exceeds its critical value. C. at least one of the independent variables has explanatory power, because the calculated F-statistic exceeds its critical value. |