Grad An independent mail delivery service wants to study factors that affect the

Question

Grad An independent mail delivery service wants to study factors that affect the daily gas usage of its delivery trucks. Using data collected from different trucks on various days, a company analyst uses a software to fit a regression model of the form y = 90.5 + 9x1-44x2 + 2x3 + 0.09x4 where y volume of gasoline used (in gallons) x, = weight of truck (in tons) x2 = tire pressure (in psi, pounds per square inch) xweight of initial package load (in hundreds of pounds) = total distance driven while delivering packages (in miles) Answer the following questions for the interpretation of the coefficient of x1 in this model Holding the other variables fixed, what is the average change in daily fuel used for each additional ton that a gallon(s) truck weighs? Is this change an increase or a decrease? UndoH Next >> Explain Fall 2017 Excel P.r...docx Type here to search

Explanation / Answer

Holding the other variables fixed , the average change in daily fuel used for each additional ton that a truck weighs is 9 gallons .

The change is an increase .  

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