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Central tendency

Central tendency is how we measure the average of a group of numbers. It is kind of like a middle of a group of numbers. For example, if you have a group of 5 numbers - 2, 4, 6, 8, 10 - the central tendency (or the average) of that group would be 6. That is the middle number.
Related topics others have asked about:
Central moment, Expected value, Location parameter, Mean, Population mean, Sample mean