Question

After keeping track of his heating expenses for several winters, a homeowner believes he can estimate the monthly cost from the average daily Fahrenheit temperature using 20- the model cost = 123 2.15 temp. The residuals plot for his data is shown. Complete parts (a) through (g) below. 15- 10- 5- 0- T T 0 10 20 30 40 -5- -10 15 -20 Average Temperature c) During the months when the temperature stays around freezing (32° F), would you expect the cost predictions based on the model to be accurate, too low, or too high? Explain. A. Too low, because the residual of the value at 32° is positive. B. Accurate, because the residual of the value at 32° is positive. C. Accurate, because the predicted and observed values at 32° are very close. D. Too high, because the residual of the value at 32° is negative. d) What heating cost does the model predict for a month that averages 10°? cost $101.5 (Round to the nearest cent as needed.) e) During one of the months on which the model is based, the temperature did average 10°. What were the actual heating costs for this month? The actual heating costs for this month were $. (Round to the nearest dollar as needed.) Residuals

Answer 1

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