null hypothesis
What null hypothesis means in Psychology A-Level, as defined for AQA, OCR.
Definitions of null hypothesis
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Reference: OCR
The assumption that is held to be true when a probability value is calculated, and which is rejected when the p-value is small enough.
A statement that there is no difference beyond chance, which a statistical test allows you to reject at the 0.05 level.
Topics that use null hypothesis
- Scientific processes (AQA A-Level)
- D.1 – handling data (OCR A-Level)
Related terms
- Absenteeism and productivity
- Abstract
- Aim
- Application of research to policy
- bar charts and histograms
- calculating tests of difference
- central tendency on a curve
- checking data quality
Using null hypothesis in the exam
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