
Chapter 15
588
The dummy variable for gender was de ned as
x
2
= 0 (For female)
x
2
= 1 (For male)
For female (x
2
= 0), the regression equation takes the following form:
.( ).
y
489 849404ag
ender
489 849404 0
1
when (x
2
= 0)
.
489 849
1
Productivity = 489 + 8.49 age when (x
2
= 0)
For male (x
2
= 1) the regression equation takes the following form
x
489 849404
489 849404 1
1
when (x
2
= 1)
529 4849
1
Productivity = 529.4 + 8.49x
1
Productivity of females when the age is 45.
Productivity = 489 + 8.49 × 45 = 489 + 382.05 = 871.05
Productivity of males when the age is 45.
Productivity = 529.4 + 8.49x
1
Productivity = 529.4 ...