Explain chi square test with a simple example
The short version: chi square test refers to a test comparing observed frequencies with expected frequencies. A quick example makes it concrete — A chi square test can check whether a die is fair.
How to approach it step by step
Once one example makes sense, the method generalises: build the expected table, sum (O − E)²/E, then compare with the critical value. In a visual interactive session the example is built on screen piece by piece, so you see which quantity changes at each step instead of only reading a final answer. Ask for a harder variant and the explanation adapts on the spot.
Worked example
A chi square test can check whether a die is fair.
The mistake most learners make
Applying it to very small expected frequencies where the test is unreliable.
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