A manager at a local bank analyzed the relationship between monthly salary (y, in $) and length of service (x, measured in months) for 30 employees. She estimates the model:Salary = ?0 + ?1 Service + ?. The following ANOVA table summarizes a portion of the regression results. dfSSMSFRegression1555,420555,4207.64Residual271,962,87372,699 Total282,518,293 CoefficientsStandard Errort-statp-valueIntercept784.92322.252.440.02Service9.193.202.870.01How much of the variation in Salary is unexplained by the sample regression equation?
A. 77.94%
B. 2%
C. 18.39%
D. 1%
Answer: A
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