Demand for Utilities A short-term study was conducted to investigate the effect of m...

Demand for Utilities A short-term study was conducted to investigate the effect of mean monthly daily temperature increased because of the increasing cost of fuel. The company fitted the model

to the data shown in the table. The Excel printout for this multiple regression problem is also provided.

a. Do the data provide sufficient evidence to indicate that the model contributes information for the prediction of mean daily kilowatt-hour consumption per household? Test at the 5% level of significance.

b. Graph the curve depicting per kilowatt-hour. Are the consumption curves different?