LEVELS OF MEASUREMENT
Levels of measurement: nominal, ordinal, interval, and ratio data. What they actually mean, how to recognise them in exam questions, and why they determine the statistics you can and cannot use, with clear AQA-focused examples.
Levels of measurement: nominal, ordinal, interval, and ratio data. What they actually mean, how to recognise them in exam questions, and why they determine the statistics you can and cannot use, with clear AQA-focused examples.