Cellulon, a manufacturer of a new type of home insulation, wants to develop guid

Question

Cellulon, a manufacturer of a new type 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 outside temperature affects gas consumption. In the laboratory, it varied the insulation thickness and temperature. A few of the findings are as follows:

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

What effect would installing 18 cm of insulation instead of 15 have on the monthly natural gas consumption (assuming that the outside temperature remains at 10ºC)? (Round the final answer to 3 decimal places.)

Cellulon, a manufacturer of a new type 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 outside temperature affects gas consumption. In the laboratory, it varied the insulation thickness and temperature. A few of the findings are as follows:

Explanation / Answer

A) X1 = 15

X2 = 10

Y' = 36.59 - 0.192 * 15 - 1.313 * 10 = 20.58 cubic feet

B) if X1 increases , then Y' will decrease.

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