How to Choose the Right Statistical Test (And Explain It to a Judge)

One question unlocks the answer every time: what kind of variables do you have?

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When a science fair judge asks "why did you use that test," most students freeze. But the answer is simpler than it sounds. Every statistical test choice comes down to two things: what kind of variables you have and what your central question is. In this post we break down the quick, snappy answer for the four most common tests — ANOVA, t-test, chi-square, and linear regression — so your students are never caught off guard.

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