Mathematics: Applications and Interpretation · Topic 4: Statistics and probability

AHL4.12 — Data collection, reliability and validity

Mathematics: Applications and Interpretation · SL / HL · syllabus-mapped notes

1. AIAHL4.12.1

   Designing valid data collection

   Surveys and questionnaires; biased vs unbiased and structured questioning; selecting relevant variables.

2. AIAHL4.12.2

   Categorising data for the $\chi^2$ test

   Choosing categories with expected frequencies above $5$ and the correct degrees of freedom.

3. AIAHL4.12.3

   Reliability and validity

   Test-retest and parallel forms; content and criterion-related validity.