Delmarva Power is a utility company that would like to predict the monthly heating bill for a household in Kent County during the month of January. A random sample of households in the county was selected and their January heating bill recorded along with the following variables: SF: the square footage of the house Age: the age of the current heating system in years Temp: the thermostat setting, in degrees Fahrenheit, during the day The following figure shows the regression output from Excel.
a. Test the significance of each independent variable using α = 0.05.
b. Construct a 95% confidence interval for each regression coefficient and interpret the meaning.

  • CreatedJuly 29, 2015
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