Hypotheses and Errors
Students need to be able to state the null and alternative hypotheses for the tests, and be aware of Type I and Type II errors.
Tasks/Ideas
- Leckie Higher Applications Student Book – Chapter 8 – Exercise 8A
- A worksheet on Type I and Type II errors is here: Type I and Type II Errors. Answers, and original version here.
Confidence Intervals
Tasks/Ideas
- Leckie Higher Applications Student Book – Chapter 8 – Exercise 8B
- The best way to understand confidence intervals is to use this webpage by Bruce Dudek: https://shiny.rit.albany.edu/stat/confidence/. It’s so essential the SQA link to this page in the course specification!
Confounding Variables
XKCD:
Tasks/Ideas
- Leckie Higher Applications Student Book – Chapter 8 – Exercise 8C
- This website lists many examples of spurious correlations: Spurious Correlations
- A PowerPoint that gives a gentle introduction to the idea: Ceviche on TES