# Question: Suppose the Department of Energy would like to investigate the

Suppose the Department of Energy would like to investigate the linear relationship between the cost of heating a home during the month of February in the Northeast and the home’s square footage. Data for a random sample of 10 homes are as follows:

a. Construct a 90% confidence interval to estimate the average cost in February to heat a Northeast home that is 2,400 square feet.

b. Verify your results with PHStat.

a. Construct a 90% confidence interval to estimate the average cost in February to heat a Northeast home that is 2,400 square feet.

b. Verify your results with PHStat.

## Answer to relevant Questions

Use the data in Problem 14.30 to construct a 90% prediction interval to estimate the cost in February to heat a Northeast home that is 2,400 square feet. Verify your results using PHStat. In Problem The Human Resource Department at Neumann University would like to examine the linear relationship between a faculty member’s performance rating (measured on a scale of 1– 20) and his or her annual salary increase. The ...Consider the following set of ordered pairs: a. Calculate the correlation coefficient. b. Using α = 0.05, perform a hypothesis test to determine if the population correlation coefficient is less than zero. Fair Isaac, the company that developed the credit score model used by most lenders today, would like to examine the linear relationship between the age and credit score of an individual. The following table shows the credit ...Answer the following questions using the data from Problem 14.56: a. Calculate the coefficient of determination. b. Using α = 0.01, test the significance of the population coefficient of determination. c. Construct a 99% ...Post your question