In A/B testing, when it comes to statistical significance, what is the minimum confidence level HubSpot suggests?
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Correct answer: 95%.
Why this is the answer
A/B testing should use enough confidence to reduce the risk of choosing a winning version based on random variation. HubSpot recommends a 95% confidence level as the minimum threshold for statistical significance. This helps ensure the performance difference between versions is meaningful enough to guide future decisions. The result should still be interpreted alongside sample size, test duration, and the selected marketing email analytics metric.
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