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  • Created by: Emma
  • Created on: 27-01-11 10:08

Descriptive statistics

Levels of Measurement

  • NOMINAL - Putting data into categories.
  • ORDINAL - Putting data into rank order.
  • INTERVAL - Equal numbers that indicate a different when comparing things; no meaningful zero.
  • RATIO - Has same characteristics as interval data, except that it has a meaningful zero.


Measures of Central Tendency

  • MODE - Most common value.
  • MEDIAN - Arrange results in ascending order to find the middle value (average).
  • MEAN - All numbers are added together, then divided by the amount of numbers present.


Measures of Dispersion

  • RANGE - Highest and lowest values are added together, then divided by 2.
  • STANDARD DEVIATION - Spread of scores in relation to the mean score 


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