A sawmill spends two weeks fitting a board grader on labeled photos of past cuts. After that job ends, the line scores every new board in under a second and does not update the grader from those live boards. Which statement names the two phases correctly?
Select an answer to reveal the explanation.
Short Explanation
Think of it like teaching someone to grade boards, then putting them on the line. The two-week fit is school (training). The under-a-second score on a new board is the test they already know how to take (inference), and watching boards go by does not become more school unless the grader gets updated.
Full Explanation
Training is the fitting phase that uses labeled examples to produce a model. Inference is the later scoring of new examples with that fitted model, which is what the line does in under a second. Watching live boards without updating the grader is not training. Using photos does not turn training into inference, and feature engineering is input preparation, not the live scoring step.