Discussion
Mean, Median and Mode are :
Answer: D
Mean, median and mode are measures of central tendency.
Each gives one value that represents the centre of a distribution. The mean is the sum of the values divided by their number, the median is the middle value when the data are arranged in order, and the mode is the value that occurs most often.
Measures of deviation (dispersion), such as the range, mean deviation and standard deviation, describe the spread of the data around that centre, not the centre itself. Ways of sampling (random, stratified, systematic) concern how data are collected. 'Measures of control tendency' is a distractor built on a near-miss of the correct term.
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