You would like to know how having health insurance affects how many years one lives after having a heart attack (the variable "Survival"). You obtain the following SRF (Sample Regression Function):
Survival_hat = 60.7 + 5.5Insured - 3.8Uninsured + 4.3*Income
What can you conclude?
A. Holding all else constant, being insured results in longer survival after a heart attack.
B. Holding all else constant, being uninsured is associated with shorter survival after a heart attack.
C. Nothing, the income variable must have an error.
D. Nothing, the insurance variables must have an error.
E. None of the above.
Answer: D. Nothing, the insurance variables must have an error.