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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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Which mathematical test do I need to use?

I have a dataset showing the yearly stock returns for two investment styles (growth and value investing) as well as a column showing the difference between the returns for each year. I have attached a …
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