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Statistical significance is a characteristic of a statistic viewed in light of a null hypothesis and a given significance level. It reflects whether the statistic belongs to the rejection region (is statistically significant) or the acceptance region (is not statistically significant).

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What is the correct test for determining if a group is significantly more popular than another?

I am changing one variable in a piece of software I am writing so that it has two variants. I am able to measure how many users continue to use the software a week after opening it for the first time. …
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