A second dye house is so short on lots that it skips the holdout and quotes the average fold score as the official number. What should the tester know?
Select an answer to reveal the explanation.
Short Explanation
Skipping the holdout and quoting the average fold score as the official number is optimistically biased. That average is not an unbiased estimate. Leave-one-out and bootstrap are named alternatives when data is extremely scarce.
Full Explanation
Without a holdout, the averaged fold score is optimistic. The syllabus names leave-one-out and bootstrap as scarce-data alternatives. Treating the average as unbiased, forbidding those alternatives, or substituting Chapter 6 A/B is incorrect.