eBook The exercise involving data in this and subsequent sec

eBook The exercise involving data in this and subsequent sections were designed to be solved using Excel. In a regression analysis involving 30 observations, the following estimated regression equation was obtained. Enter negative values as negative humbers, a. Interpret bi, b2, ba. and bs in this estimated regression equation. Assume that for each coefficient statement, the remaining three variables are held constant (to 1 decmal) b3.8 estimated change in y per 1 unit change in z1 b2.3 63 estimated change in y per 1 unit change in za bs 7. estimated change in y per 1 unit change in z b4 = ,, 2,7 o estimated change in y per 1 unit change in z4 b. Estimate y when z 10, 2 5, zs 1, and 2. (to 1 decimal) 57.1

Solution

note that the coefficient of x2 is -2.3

hence

b2 = -2.3 and not 2.3

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