SCENARIO 14-6
One of the Most Common Questions of Prospective $\beta$

Multiple Choice

SCENARIO 14-6
One of the most common questions of prospective house buyers pertains to the cost of heating in dollars (Y) . To provide its customers with information on that matter, a large real estate firm used the following 2 variables to predict heating costs: the daily minimum outside temperature in degrees of Fahrenheit ( X₁ ) and the amount of insulation in inches ( X ₂ ) . Given below is EXCEL output of the regression model.



Also SSR (X₁ | X₂) = 8343.3572 and SSR (X₂ | X₁) = 4199.2672
-Referring to Scenario 14-6,the estimated value of the regression parameter $\beta$ ₁ in means that

A) holding the effect of the amount of insulation constant,an estimated expected $1 increase in heating costs is associated with a decrease in the daily minimum outside temperature by 2.76 degrees.
B) holding the effect of the amount of insulation constant,a 1 degree increase in the daily minimum outside temperature results in a decrease in heating costs by $2.76.
C) holding the effect of the amount of insulation constant,a 1 degree increase in the daily minimum outside temperature results in an estimated decrease in mean heating costs by $2.76.
D) holding the effect of the amount of insulation constant,a 1% increase in the daily minimum outside temperature results in an estimated decrease in mean heating costs by 2.76%.