8.6 - 8.6 (a) Let Y be the number of years of experience,...

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8.6 (a) Let Y be the number of years of experience, and M be the measurement error in inches. We have the following data: i y i m i y i m i y i 2 1 3 1.5 4.5 9 2 5 0.8 4 25 3 10 1 10 100 4 20 0.8 16 400 5 25 0.5 12.5 625 Σ 63 4.6 47 1159 From Eq. 8.4 & 8.3, we have ± β = ym nym yn y ii i 22 = -0.030010953, and ± ± α =− m y = 1.298138007 so our regression model is M mean = 1.298138007 - 0.030010953 Y , Hence the mean measurement error when a surveyor has 15 years of experience is estimated to be 1.298138007 + (-0.030010953)(15) = 0.847973713,
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This note was uploaded on 04/07/2008 for the course CVEN 3227 taught by Professor Strzepek during the Spring '08 term at Colorado.

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