Complete lesson on the Chi-squared test. Easy to use and follow PowerPoint. Simplifying standard deviation for students with step-by-step worked chi-squared calculations. The accompanying workbook is aligned with the PowerPoint. It reinforces learning with exercises, ensuring students grasp the concepts independently. Please note this is not a pure mathematics lesson on the chi-squared test, so does not go into detail on how it is derived. Lesson objectives: Define null hypothesis.Calculate