What may happen if you cannot obtain training data that better matches your validation set?

A Mismatch Always Has a Clear Fix

If no additional data can be gathered that better matches the dev set, the route to better performance may not be _____ at first.

Match each data-mismatch idea with the statement that best describes it.

Order the reasoning steps when hard dev examples appear to come from data mismatch.

Why a Lack of Matching Training Data Can Block Improvement

Case Study: Model Improvement Hits a Dead End in Retail Forecasting

Is Success Guaranteed When Seeking Better-Matched Training Data?

What is the most accurate description of handling a training–target data mismatch?

True or False: If you cannot collect training data that better reflects the real-world setting, improving performance may become difficult or stall.