Bradford Electric Illuminating Company is studying the relationship between kilowatt-hours (thousands) used and the number of rooms in a private single-family residence. A random sample of 10 homes yielded the following. Number of Rooms 12 9460 14 10 Kilowatt- Hours (thousands) 7 10 5 Number of Rooms 8 Standard error of estimate 18 10 5 Kilowatt- Hours (thousands) 6 8 10 4 a. Determine the standard error of estimate. (Round your answer to 3 decimal places.) b. Determine the coefficient of determination. (Round your answer to 2 decimal places.)

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