type 1 and type 2 errors
What type 1 and type 2 errors means in Psychology A-Level, as defined for AQA, OCR.
Definitions of type 1 and type 2 errors
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Reference: OCR
Accepting a difference that is not really there, made more likely by a lenient level, and missing a real one, made more likely by a strict level, where tightening one raises the other.
A stricter level is chosen where a Type 1 error would be serious, and that stricter level raises the risk of a Type 2 error instead.
A Type 1 error is rejecting a true null; a Type 2 error is retaining a false null.
Topics that use type 1 and type 2 errors
- Algebra (AQA A-Level)
- Handling data (AQA A-Level)
- Data recording, analysis and presentation (OCR A-Level)
Related terms
- degrees of freedom
- levels of measurement
- levels of significance
- measures of central tendency
- measures of dispersion
- significant figures
- bar chart
- calculating the Sign test
Using type 1 and type 2 errors in the exam
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