levels of significance
What levels of significance means in Psychology A-Level, as defined for AQA, OCR.
Definitions of levels of significance
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Reference: OCR
The chosen level, typically 5% or 1%, against which the calculated probability is compared, with the stricter 0.01 level used when false claims carry heavy costs.
The 0.05 level accepts a five percent probability that the pattern arose by chance, while the stricter 0.01 level cuts that to one percent.
A threshold probability set to decide whether to reject the null hypothesis, representing the maximum acceptable risk of a Type 1 error.
Preset thresholds, such as 0.05 and 0.01, used to decide whether a calculated probability is small enough to reject the null hypothesis.
The 0.05 level means there is a 5% probability of a result at least as extreme arising by chance if the null hypothesis were true.
Topics that use levels of significance
- Algebra (AQA A-Level)
- Handling data (AQA A-Level)
- D.1 – handling data (OCR A-Level)
- D.2 – algebra (OCR A-Level)
Related terms
- degrees of freedom
- co-variables
- content analysis
- correlation coefficients
- level of measurement
- levels of measurement
- measures of central tendency
- Meta-analysis
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