A researcher wishes to examine the relationship between wage
earned and educational level of workers. For a sample of 4000
workers she has data on hourly earnings (measured in Dollar), age
of the worker (in years), worker’s gender, years of experience,
number of years with the present employer, size of the firm in
which the worker is employed, and highest educational qualification
(with 4 classifications: no qualification, secondary school
certificate, bachelor degree or PhD)
Explain how you would set up...