n environmentalist be costs are the outside lieves that the two main factors tha

Question

n environmentalist be costs are the outside lieves that the two main factors that influence a home's heating temperature and the age of its furnace. She collects data on the ating cost of 20 homes in January (y). the average outside temperature in degrees Fahrenheit (x1), and the age of the furnace (x2). She estimates the following model v-A0 + M x, + 2X2 + ;" The results of the regression are: -value tandard Error 9.6 8 oefficient statistics 17 5.93 1.52 Intercept 27.2 Temperature4 Age 007 148 R2=0.80;

Explanation / Answer

13) sample size n = 20

14) The regression equation is

heating cost = 427.2 - 4.6 * Temperature + 6.1 * Age

when temperature = 30 , age = 10,

predicted heating cost = 427.2 - (4.6 *30)+ (6.1*10) = 350.2

ans) a)

15. B. No, because p-value = 0.148 > 0.05

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