Exercise 1 You should start a do-file where you collect all the commands, so you can replicate the analysis at a later date. The data we use comes from the paper Americans do I.T better: US ...
A two-valued qualitative variable can be represented by a single 0-or-1-valued "dummy" variable. If a qualitative variable has three or more possible values (e.g., make-of-car, or marital-status), ...
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