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A regression line is used to satisfactorily describe the relationship between amount of car surface per square inch and drying time (in minutes) of 24 cars in a car wax drying time study. The regression analysis is shown.
Variabel Coeff SE Coeff t. Ratio P-Value
Constant 4.5893 0.2784 16.49 0.0023
Amount of car surface 5.8493 0.3827 15.30 0.0045
R square = 89.1% R square (adj) = 90.1%
Which expression should be used to compute a 96 percent confidence interval for the slope of the regression line?
A. 5.8493 ± 2.172(0.3827)
B. 5.8493 ± 2.183(0.3827)
C. 5.8493 ± 2.177(0.3827)



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