The unstandardized equation is: = bX + a

a and bcan be found in the "Unstandardized B" column of the Coefficients table in the SPSS output. Once you fill in thea and bfor the equation, you can use that equation to solve the problem.represents the outcome variable and we want it to be 5 (as specified in the question), so plug in 5 forand then solve the X, which represents the value for the predictor variable.

Question: Using the unstandardized regression equation, calculate the value for the predictor that will give the car Acceleration measure as 5 (5 seconds to 60mph)? Round the answer to two decimial places.

Coefficients Standardized Unstandardized Coefficients Coefficients Model B Std. Error Beta Sig 1 (Constant) 21.046 .423 49.778 000 Horsepower -.051 003 -.739 -15.707 000 a. Dependent Variable: Acceleration