91¶¶Òõ

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91¶¶Òõ

Last updated

15 April 2026

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IB Maths AI HL 4.12 Notes – Designing Reliable Surveys and 91¶¶Òõts

This IB Maths AI HL 4.12 resource covers Designing Reliable Surveys and 91¶¶Òõts and is fully aligned with the IB Applications and Interpretation HL syllabus

Students learn how to design valid and reliable data collection methods, select relevant variables linked to a research question, and classify data as categorical or quantitative. The resource develops understanding of measurement scales, unbiased survey design, reliability vs validity, and methods such as test–retest and Pearson’s correlation for measuring consistency.

Guidance is also provided on preparing data for chi-squared tests, selecting appropriate degrees of freedom, and ensuring expected frequencies meet IB requirements.

Ideal for IB Maths AI HL teachers supporting Internal Assessment skills and statistical investigation design.

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