Use the following data set for Exercises 27–33. Note that is a dummy variable.

−0.7 2 0.1 0
6.4 4 −2.5 1
2.8 6 2.7 0
9.4 8 2.8 1
8.6 10 −1.6 0
13.1 12 1.0 1
12.2 14 −1.4 0
19.1 16 −0.5 1
18.8 18 1.0 0
23.2 20 −2.3 1

Question 13.131

29. Interpret the coefficient for the dummy variable.

13.3.29

For each increase in one unit of the variable , the estimated value of increases by 3.55 units when the values of and are held constant.