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- If it’s 3 participants out of 100, that’s 3% of responses, and you we can safely ignore it.
- If it’s 3 participants out of 20, that’s 15%, which is much harder to ignore.
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- When we have small numbers, any answer that gets a few clicks must be considered.
- When we have large numbers, it’s much easier to spot outliers and ignore them. 50 participants is a good minimum for this, and 100 or more make it very easy to identify answers you we can ignore.
As a rough rule of thumb, we ignore results of about 5% or less. For 50 participants, that means ignoring answers that get 1 or 2 (or even 3) clicks, which is very common in tree-test results.
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