what do you mean by data assembly?
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mean does not mean the center of the data
The mean of a set of data is the sum of that data divided by the number of items of data.
Mean data are observations whose values are equal to the mean of the data set. By default it is the arithmetic mean but it could be the geometric or harmonic mean - if those measures are more appropriate.
data means information
The sum of the data divided by the number of pieces of data