Maurice Tutor

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Category > Management Posted 08 Jan 2018 My Price 8.00

outdoor temperature affect

4.   Cellulon, a manufacturer of home insulation, wants to develop guidelines for builders and consumers on how the thickness of the insulation in the attic of a home and the outdoor temperature affect natural gas consumption. In the laboratory, it varied the insulation thickness and temperature. A few of the findings are:

 

Monthly Natural Gas Consumption (cubic feet),

Thickness of Insulation (inches),

Outdoor Temperature (OF),

Y

X1

X2

30.3

6

40

26.9

12

40

22.1

8

49

On the basis of the sample results, the regression equation is:

Yˆ  = 62.65 - 1.86X1 - 0.52X2

a.   How much natural gas can homeowners expect to use per month if they install 6 inches of insulation and the outdoor temperature is 40 degrees F?

b.  What effect would installing 7 inches of insulation instead of 6 have  on  the monthly natural gas  consumption  (assuming  the  outdoor  temperature  remains  at 40 degrees F)?

c.   Why are the regression coefficients b1 and b2 negative? Is this logical?

 

Answers

Maurice Tutor
(5)
Status NEW Posted 08 Jan 2018 02:01 PM My Price 8.00

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