# Question

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:

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:

## Answer to relevant Questions

A realtor studied the relation between x = yearly income (in thousands of dollars per year) of home purchasers and y = sale price of the house (in thousands of dollars). The realtor gathered data from mortgage applications ...Refer to Exercise 11.57. a. For this exercise, would it make sense to give any physical interpretation to β0? b. Consider an alternative model relating weight gain to amount of lysine ingested: Distinguish between this ...An airline designs a study to evaluate fuel usage by a certain type of aircraft. From a random sample of 50 flights, the flight length in hundreds of miles and the fuel usage in gallons are recorded. a. Plot fuel usage ...Refer to Exercise 11.70. a. Estimate the dose level needed to produce a CUMVOL of 20. b. Place a 95% confidence interval on your estimate. In exercise In screening for compounds useful in treating hypertension ( high blood pressure), researchers assign six rats to each of three groups. The rats in group 1 receive .1 mg/ kg of a test compound; those in groups 2 and 3 ...Post your question

0