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A/B Testing: What is a sufficient number of people to do A/B testing with? 10, 20, 100, 1000? Why? Should this be a closed group initially or not?
RV
RV
Robert-Jan van Veen, Over 15 years experience in educational design answered:

Statistically speaking, a pool of 30 respondents is enough to start seeing a trend. 100 is about the maximum. Beyond that it's just more of the same pattern and it might even start getting confusing, because the differences will start to level out.

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