Refer to Exercise 11.52.
a. Predict the average gas consumption for both groups of homes when the temperature difference is 20° F.
b. Place 95% confidence intervals on your predicted values in part (a).
c. Based on the two confidence intervals, do you believe that the average gas consumption has been reduced by using the new form of insulation?
d. Predict the gas consumption of a home insulated with the new type of insulation if the temperature difference was 50° F.
In exercise
Data for Homes with Standard Form of Insulation:
Data for Homes with New Form of Insulation:

  • CreatedNovember 21, 2015
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