**Significance Testing (t-tests) | Research Rundowns**
https://researchrundowns.com/quantitative-methods/significance-testing/

Jul 18, 2009 · To test the null hypothesis, A = B, we use a significance test. The italicized lowercase p you often see, followed by > or < sign and a decimal ( p ≤ .05) indicate significance. In most cases, the researcher tests the null hypothesis, A = B , because is it easier to show there is some sort of effect of A on B, than to have to determine a positive or negative effect prior to conducting the research.

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