Author Question: A multiple regression model has the form: y = 5.25 + 2.5x1 + 4x2 . As x2 increases by 1 unit, ... (Read 115 times)

LCritchfi · **on:** Jun 24, 2018

A multiple regression model has the form: y = 5.25 + 2.5x1 + 4x2 . As x2 increases by 1 unit, holding x1 constant, then the value of y will increase by:
a. 2.5 units.
b. 7.75 units.
c. 4 units on average.
d. 11.75 units on average.

Question 2

A multiple regression model has the form y = b0 + b1x1 + b2x2 . The coefficient b1 is interpreted as the:
a. estimated change in y per unit change in x1.
b. estimated change in y per unit change in x1, holding x2constant.
c. estimated change in y per unit change in x1, when x1 and x2 values are correlated.
d. estimated change in y per unit change in x2, holding x1 constant.