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Question 7 Consider this estimated equation log(y) = 2 + .1 x1 + .02 x1 x2 The c

ID: 3049056 • Letter: Q

Question

Question 7

Consider this estimated equation

log(y) = 2 + .1 x1 + .02 x1 x2

The change in log(y) for a change in x1 is

.1 +.02 x1

.1 +.02 x2

2.1 +.02 x2

.1 +.04 x2

.1 -.02 x2

02 x2

Question 8

Consider this estimated equation

log(y) = 2 + .1 x1 + .02 x1 x2

The predicted value of y when x1 = 4 and x2 = 8 is

2.9

20.9

36.7

47.9

30.1

18.5

Question 9

Consider this estimated equation

log(y) = 2 + .1 x1 + .02 x1 x2

The predicted value of y when x1 = 5 and x2 = 8 is

27.11

7.11

63.87

17.37

9.85

Question 10

Consider this estimated equation

log(y) = 2 + .1 x1 + .02 x1 x2

The percentage change in y when x1 goes from 4 to 5 (for x2 = 8) is

13.75%

54.10%

29.69%

36.17%

-27.11

.1 +.02 x1

.1 +.02 x2

2.1 +.02 x2

.1 +.04 x2

.1 -.02 x2

02 x2

Explanation / Answer

7)

.1 +.02 x2

8) The predicted value of y =e2+0.1*4+0.02*4*8 =20.9

9) predicted value of y =e2+0.1*5+0.02*5*8 =27.11

10)  percentage change in y =(27.11-20.9)*100/20.9 =29.69%

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