Psychology A-Level
Critical values, N and degrees of freedom
What Critical values, N and degrees of freedom means in Psychology A-Level, as defined for AQA.
Definition of Critical values, N and degrees of freedom
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Reference: AQA
Three things are needed to find a critical value in a table: N or the degrees of freedom, whether the test is one-tailed or two-tailed, and the chosen level of significance.
Topics that use Critical values, N and degrees of freedom
- Inferential testing (AQA A-Level)
Related terms
- Calculated value versus critical value
- Experimental design: related and unrelated
- level of measurement
- Level of significance and the 5% convention
- Null hypothesis and alternative hypothesis
- one tailed and two tailed tests
- Parametric assumptions
- Probability and chance
Using Critical values, N and degrees of freedom in the exam
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