The distance between the mean and an observation in the data set.

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Subject 4. Measures of Center Tendency thmetic mean computation. A data set has only one arithmetic mean. This indicates that the mean is unique. The arithmetic mean is the only measure of central tendency where the sum of the deviations of each value from the mean is always zero. <span>Deviation from the arithmetic mean is the distance between the mean and an observation in the data set.
The arithmetic mean has the following disadvantages:
The mean can be affected by extremes, that is, unusually large or small values. The mean cannot be determi

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