levels of measurement
What levels of measurement means in Psychology A-Level, as defined for AQA, OCR.
Definitions of levels of measurement
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Reference: AQA
Nominal data require the mode, ordinal data are best summarised by the median, and interval/ratio data allow the mean unless anomalies distort it.
The level of measurement is one of the three criteria for test selection and may be nominal, ordinal, or interval.
Rank data by how much information each score carries, and the level decides what you may legitimately do with it.
The level of measurement dictates the statistical test, with data being nominal, ordinal or interval level.
Topics that use levels of measurement
- Data handling and analysis (AQA A-Level)
- Handling data (AQA A-Level)
- D.1 – handling data (OCR A-Level)
- Data recording, analysis and presentation (OCR A-Level)
Related terms
- co-variables
- measures of central tendency
- Meta-analysis
- normal distribution
- primary data
- qualitative data
- quantitative data
- secondary data
Using levels of measurement in the exam
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