Consider the following regression model:
where:
The following estimated regression equation was obtained from a sample of 30 observations:
a. Provide the estimated regression equation for instances in which x1 < 20.
b. Determine the value of y when x1 = 10.
c. Provide the estimated regression equation for instances in which x1 > 20.
d. Determine the value of y when x1 = 30. |
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