The Chi-squared test

Our second inferential statistical test - the chi-squared test. This is used when the hypothesis predicts a difference or an association between two conditions, when the data is nominal (categoric) and when the categories used are independent of each other.

The two chi-squared worksheets are here and here. See me if you need the past paper question and mark scheme on this topic as it's old style copy and paste ie not electronic (likewise for the answer sheet to the worksheets).

If you are confused about types of data (nominal etc), I plan to go over this next lesson and clarify matters.