03 · Practise and check
Try this yourself
Imagine a search result list. Explain what adding many weak results could do to recall and precision.
Check your understanding
Adding results may find more relevant items and increase recall, while irrelevant additions reduce precision. The exact effect depends on which items are added.
A mistake to avoid
If a denominator is zero, choose and document a handling convention rather than silently reporting a misleading percentage.
Before looking at the answer, write a short explanation and one example of your own. Finish by naming one limitation of the method. Use Mark as read when you are ready, or return to the previous lesson if a term is unclear.
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