probability density
What probability density means in Mathematics A-Level, as defined for Pearson Edexcel, WJEC.
Definitions of probability density
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Reference: WJEC
A continuous curve towards which a relative frequency histogram smooths as sample size grows and class intervals narrow, where total area equals 1.
The same area principle underlies continuous probability density functions, where probability equals the area under the curve between two values.
Topics that use probability density
- Data presentation and interpretation (Pearson Edexcel A-Level)
- Data presentation and interpretation (AS Unit 2: Applied Mathematics A) (WJEC A-Level)
Related terms
- Frequency density
- regression lines
- relative frequency
- scatter diagrams
- standard deviation
- Summary statistics
- bivariate interpretation
- box plot conventions
Using probability density in the exam
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