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The arithmetic mean is the most common measure of central tendency. It is simply the sum of the numbers divided by the number of numbers. The symbol Î¼ is used for the mean of a population. The symbol M is used for the mean of a sample. The formula for Î¼ is shown below: Î¼ = Î£X/N
Common measures of measures of central tendency are Mean, Median and Mode. Compare Dispersion. Definition The mean, median and mode of a set of data are measures of central tendency, i.e. they measure where the 'middle' of the data is. Also cal ed centrality. the range of a given data set is the difference between the largest number and the smal est. number in the data set.